Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Outstanding stock options (in shares)	0	0
Distributed earnings allocated to common stock	$ 7,364	$ 7,399
Undistributed earnings allocated to common stock	20,531	8,941
Net earnings allocated to common stock	27,895	16,340
Net earnings allocated to participating securities	210	73
Net income available to common shareholders	$ 28,105	$ 16,413
Weighted average shares outstanding for basic earnings per common share	25,320,930	25,523,356
Dilutive effect of stock compensation (in shares)	0	0
Weighted average shares outstanding for diluted earnings per common share	25,320,930	25,523,356
Basic earnings per common share (in dollars per share)	$ 1.10	$ 0.64
Diluted earnings per common share (in dollars per share)	$ 1.10	$ 0.64