Annual report pursuant to Section 13 and 15(d)

Stock Compensation (Narrative) (Details)

v2.4.0.6
Stock Compensation (Narrative) (Details) (USD $)
 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Mar. 31, 2012
2011 Executive Incentive Compensation Plan [Member]
Dec. 31, 2012
2011 Executive Incentive Compensation Plan [Member]
Mar. 25, 2011
2011 Executive Incentive Compensation Plan [Member]
Dec. 31, 2012
1992 Stock Plan [Member]
Dec. 31, 2012
Employee Stock Purchase Plan [Member]
Dec. 31, 2012
Employee Stock Ownership Plan [Member]
Dec. 31, 2011
Key Executive Employees [Member]
1992 Stock Plan [Member]
Jun. 30, 2012
Non-Employee Directors [Member]
2011 Executive Incentive Compensation Plan [Member]
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Dec. 31, 2012
Non-Employee Directors [Member]
Stock Option Plan For Directors [Member]
Dec. 31, 2011
Non-Employee Directors [Member]
Stock Option Plan For Directors [Member]
Dec. 31, 2010
Non-Employee Directors [Member]
Stock Option Plan For Directors [Member]
Dec. 31, 2012
Deferred Stock [Member]
Dec. 31, 2011
Deferred Stock [Member]
Mar. 31, 2012
Deferred Stock [Member]
Key Employees [Member]
2011 Executive Incentive Compensation Plan [Member]
Mar. 31, 2012
Deferred Stock [Member]
Key Executive Employees [Member]
2011 Executive Incentive Compensation Plan [Member]
Dec. 31, 2011
Deferred Stock [Member]
Key Executive Employees [Member]
1992 Stock Plan [Member]
Dec. 31, 2011
Deferred Stock [Member]
Tied To Achievement Of 2010 Performance Goals [Member]
Key Employees [Member]
1992 Stock Plan [Member]
Dec. 31, 2011
Deferred Stock [Member]
Tied To Achievement Of 2011 To 2013 Performance Goals [Member]
Key Employees [Member]
1992 Stock Plan [Member]
Jun. 30, 2012
Restricted Stock Units (RSUs) [Member]
2011 Executive Incentive Compensation Plan [Member]
Jun. 30, 2012
Restricted Stock Units (RSUs) [Member]
Non-Employee Directors [Member]
2011 Executive Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                              
Number of awards authorized           1,000,000                                  
Awards granted       92,223               0 0 18,000 105,698 105,836 94,242 9,456 12,156 16,092 77,588 25,879  
Award expiration period       7 years           7 years       10 years                  
Award vesting percentage       25.00%         30.00% 25.00%                          
Minimum percentage of revenue growth required to earn deferred stock       150.00%           150.00%                          
Number of employees receiving awards                     7                        
Value of awards granted                                             $ 40,000
Award vesting period                 7 years                           1 year
Inital award vesting period                 3 years                            
Awards avaliable for grant         773,026   154,430 52,564                              
Number of options granted                   96,250                          
Number of shares automatically granted                           3,000                  
Unrecognized compensation expense related to stock options 161,000 102,000 0                                        
Recognition period for unrecognized compensation expense 3 years                           1 year 8 months 12 days                
Aggregate intrinsic value of options outstanding 108,000                                            
Unrecognized compensation expense related to deferred stock shares                             297,000 302,000              
Excess tax benefits from exercise of stock options 21,000 22,000 35,000                                        
Net cash proceeds from exercise of stock options 86,000 73,000 0                                        
Intrinsic value of all options exercised 59,000 61,000 183,000                                        
Share based compensation expense before income taxes 303,000 449,000 39,000                                        
Share based compensation expense after income taxes 197,000 292,000 25,000                                        
Percentage of price of common stock at which employees are able to acquire               90.00%                              
Requisite service period                 1 year                            
Shares of ESOP allocated to accounts of eligible employees 601,281                                            
ESOP contributions $ 463,819 $ 508,198 $ 316,027                                        
Issuance of common stock to Employee Stock Ownership Plan, Shares 44,598 36,145 22,493