Earnings Per 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]
Outstanding stock options (in shares)	0	0	0	0
Distributed earnings allocated to common stock	$ 7,749	$ 7,166	$ 22,681	$ 21,714
Undistributed earnings allocated to common stock	24,472	12,755	67,422	32,941
Net earnings allocated to common stock	32,221	19,921	90,103	54,655
Net earnings allocated to participating securities	262	137	708	318
Net income available to common shareholders	$ 32,483	$ 20,058	$ 90,811	$ 54,973
Weighted average shares outstanding for basic earnings per common share	24,919,956	25,552,374	25,126,703	25,538,910
Dilutive effect of stock compensation (in shares)	0	0	0	0
Weighted average shares outstanding for diluted earnings per common share	24,919,956	25,552,374	25,126,703	25,538,910
Basic earnings per common share (in dollars per share)	$ 1.29	$ 0.78	$ 3.59	$ 2.14
Diluted earnings per common share (in dollars per share)	$ 1.29	$ 0.78	$ 3.59	$ 2.14