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Summary of Significant Accounting Policies (Basic and Diluted Earnings Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income	$ 9,312	$ 3,818
Weighted average common shares outstanding (basic)	8,415,586	8,480,975
Effect of dilutive unvested restricted stock grants	14,599	4,856
Weighted average common shares outstanding (diluted)	8,430,185	8,485,831
Basic earnings per common share	$ 1.11	$ 0.45
Diluted earnings per common share	$ 1.10	$ 0.45

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