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Stock Compensation (Narrative) (Details) (USD $)
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12 Months Ended | 1 Months Ended | 12 Months Ended | |||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Mar. 31, 2015
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Dec. 31, 2011
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Mar. 28, 2011
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Number of options outstanding | 540,404us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 309,439us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 311,153us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 236,820us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | ||
| Unrecognized compensation expense related to stock options | $ 423,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions | |||||
| Aggregate intrinsic value of options outstanding | 56,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue | |||||
| Intrinsic value of all options exercised | 40,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 38,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 59,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | |||
| Net cash proceeds from exercise of stock options | 99,000us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions | 110,000us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions | 86,000us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions | |||
| Excess tax benefits from exercise of stock options | 14,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions | 14,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions | 21,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions | |||
| Share based compensation expense before income taxes | 785,000us-gaap_AllocatedShareBasedCompensationExpense | (81,000)us-gaap_AllocatedShareBasedCompensationExpense | 303,000us-gaap_AllocatedShareBasedCompensationExpense | |||
| Share based compensation expense after income taxes | 510,000us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax | (53,000)us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax | 197,000us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax | |||
| Shares of ESOP allocated to accounts of eligible employees | 557,375us-gaap_EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares | |||||
| Shares issued under ESOP | 32,520us-gaap_StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan | 44,598us-gaap_StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan | ||||
| ESOP contributions | 385,424us-gaap_EmployeeStockOwnershipPlanESOPCashContributionsToESOP | 362,273us-gaap_EmployeeStockOwnershipPlanESOPCashContributionsToESOP | 463,819us-gaap_EmployeeStockOwnershipPlanESOPCashContributionsToESOP | |||
| Subsequent Event [Member] | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Shares issued under ESOP |
36,707us-gaap_StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
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| Employee Stock Purchase Plan [Member] | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Percentage of price of common stock at which employees are able to acquire |
90.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate / us-gaap_PlanNameAxis = us-gaap_EmployeeStockMember |
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| Awards eligible for grant |
21,483us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = us-gaap_EmployeeStockMember |
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| 2011 Executive Incentive Compensation Plan [Member] | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Number of awards authorized |
1,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = jcs_TwoThousandElevenExecutiveIncentiveCompensationPlanMember |
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| Number of options granted |
317,722us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_PlanNameAxis = jcs_TwoThousandElevenExecutiveIncentiveCompensationPlanMember |
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| Award expiration period | 7 years | |||||
| Award vesting percentage |
25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage / us-gaap_PlanNameAxis = jcs_TwoThousandElevenExecutiveIncentiveCompensationPlanMember |
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| Awards eligible for grant |
321,928us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = jcs_TwoThousandElevenExecutiveIncentiveCompensationPlanMember |
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| 1992 Stock Plan [Member] | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Awards eligible for grant |
22,008us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = jcs_NineteenNinetyTwoStockPlanMember |
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| Employee Stock Ownership Plan [Member] | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Award vesting percentage |
30.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage / us-gaap_PlanNameAxis = jcs_EmployeeStockOwnershipPlanMember |
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| Award vesting period | 7 years | |||||
| Initial award vesting period | 3 years | |||||
| Requisite service period | 1 year | |||||
| Non-Employee Directors [Member] | Stock Option Plan For Directors [Member] | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Number of options granted |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_PlanNameAxis = jcs_StockOptionPlanForDirectorsMember / us-gaap_TitleOfIndividualAxis = jcs_NonEmployeeDirectorsMember |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_PlanNameAxis = jcs_StockOptionPlanForDirectorsMember / us-gaap_TitleOfIndividualAxis = jcs_NonEmployeeDirectorsMember |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_PlanNameAxis = jcs_StockOptionPlanForDirectorsMember / us-gaap_TitleOfIndividualAxis = jcs_NonEmployeeDirectorsMember |
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| Award expiration period | 10 years | |||||
| Number of shares automatically granted to each non-employee director |
3,000jcs_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAutomaticallyGrantedInPeriod / us-gaap_PlanNameAxis = jcs_StockOptionPlanForDirectorsMember / us-gaap_TitleOfIndividualAxis = jcs_NonEmployeeDirectorsMember |
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| Employee Stock Option [Member] | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Recognition period for unrecognized compensation expense | 2 years 7 months 6 days | |||||
| Deferred Stock [Member] | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Awards granted |
48,824us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |
222,654us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |
105,698us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |
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| Award vesting period | 3 years | |||||
| Unrecognized compensation expense for awards |
342,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |
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| Recognition period for unrecognized compensation expense | 2 years 1 month 6 days | |||||
| Deferred Stock [Member] | Key Employees [Member] | 2011 Executive Incentive Compensation Plan [Member] | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Awards granted |
43,824us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_PlanNameAxis = jcs_TwoThousandElevenExecutiveIncentiveCompensationPlanMember / us-gaap_TitleOfIndividualAxis = jcs_KeyEmployeesMember |
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| Restricted Stock Units (RSUs) [Member] | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Awards granted |
13,973us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
31,354us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
25,879us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
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| Unrecognized compensation expense for awards |
$ 61,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
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| Recognition period for unrecognized compensation expense | 4 months 24 days | |||||
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- Definition
Share-based Compensation Arrangement by Share-based Payment Award, Initial Award Vesting Period No definition available.
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- Definition
Share-based Compensation Arrangement by Share-based Payment Award, Options, Automatically Granted in Period No definition available.
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. No definition available.
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| X | ||||||||||
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- Definition
Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. No definition available.
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Unrecognized cost of unvested options awarded to employees as compensation. No definition available.
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Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This item represents the amount of cash contributions during the period made by the entity to the Employee Stock Ownership Plan (ESOP). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The shares or units in an ESOP trust that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Percentage of vesting of share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Discount rate from fair value on offering date that participants pay for shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of shares of capital stock issued (purchased by employees) in connection with an employee stock ownership plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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