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Accounting for Stock Based Compensation (Schedule of Share-based Compensation, Restricted Stock Units, Activity) (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
3 Months Ended
Jun. 30, 2017
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Beginning Balance, Unvested Shares 182,498 120,386
Granted, Shares   110,988
Vested, Shares (10,420) (48,876)
Ending Balance, Unvested Shares 172,078 182,498
Beginning of Period, Weighted Average Grant Date Fair Value $ 13.19 $ 22.06
Granted, Weighted Average Grant Date Fair Value   9.19
Vested, Weighted Average Grant Date Fair Value 19.97 29.95
End of Period, Weighted Average Grant Date Fair Value $ 12.78 $ 13.19