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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net Income (Loss) Available to Common Stockholders, Diluted	$ (5,816)	$ 10,112	$ 19,596	$ 13,924
Weighted-average number of common shares outstanding - basic	20,640,519	19,504,503	19,751,853	19,862,409
Weighted Average Number Diluted Shares Outstanding Adjustment	148,752	133,186	138,819	135,944
Weighted Average Number of Shares Outstanding, Diluted, Total	20,789,271	19,637,689	19,890,672	19,998,353
(Loss) earnings per common share - basic	$ (0.28)	$ 0.52	$ 0.99	$ 0.70
(Loss) earnings per common share - diluted	$ (0.28)	$ 0.51	$ 0.99	$ 0.70
Anti-dilutive shares excluded from computation of EPS	0	69,459	0	67,759
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dividends paid on unvested shares	$ (79)		$ (214)
Restricted Shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dividends paid on unvested shares		$ (96)		$ (274)
Undistributed earnings (loss) allocated to unvested shares	$ 21	$ (2)	$ 2	$ 4