Earnings Per Common Share (Calculations of Basic and Diluted Earnings per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Distributed Earnings	$ 6,658	$ 6,941	$ 20,310	$ 19,652
Undistributed Earnings, Diluted, Total	3,454	7,828	(6,386)	18,900
Net Income (Loss) Available to Common Stockholders, Diluted	$ 10,112	$ 14,769	$ 13,924	$ 38,552
Weighted-average number of common shares outstanding - basic	19,504,503	20,415,245	19,862,409	20,023,271
Weighted Average Number Diluted Shares Outstanding Adjustment	133,186	180,524	135,944	155,363
Weighted Average Number of Shares Outstanding, Diluted, Total	19,637,689	20,595,769	19,998,353	20,178,634
Earnings per common share - basic	$ 0.52	$ 0.72	$ 0.70	$ 1.93
Earnings per common share - diluted	$ 0.51	$ 0.72	$ 0.70	$ 1.91
Anti-dilutive shares excluded from computation of EPS	69,459	844	67,759	720