Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Schedule of Changes in the Number of Deferred Stock Shares Under the Incentive Plan) (Details)

v3.21.1
Stock-Based Compensation (Schedule of Changes in the Number of Deferred Stock Shares Under the Incentive Plan) (Details) - Performance Units [Member]
3 Months Ended
Mar. 31, 2021
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares, Outstanding - December 31, 2020 | shares 272,695
Shares, Vested | shares (68,959)
Shares, Forfeited | shares (78,109)
Shares, Outstanding - March 31, 2021 | shares 125,627
Weighted Average Grant Date Fair Value, Outstanding - December 31, 2020 | $ / shares $ 3.91
Weighted Average Grant Date Fair Value, Vested | $ / shares 3.07
Weighted Average Grant Date Fair Value, Forfeited | $ / shares 3.56
Weighted Average Grant Date Fair Value, Outstanding - March 31, 2021 | $ / shares $ 4.58