Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 27,374	$ 22,732	$ 71,408	$ 64,694
Less: earnings allocated to participating securities	(255)	(220)	(679)	(618)
Net earnings allocated to common shareholders	27,119	22,512	70,729	64,076
Distributed earnings allocated to common stock	9,564	8,726	27,220	26,177
Undistributed earnings allocated to common stock	$ 17,555	$ 13,786	$ 43,509	$ 37,899
Average shares outstanding (in shares)	14,776	15,279	14,878	15,501
Effect of dilutive securities:
Employee stock awards (in shares)	24	23	23	25
Average shares outstanding, diluted (in shares)	14,800	15,302	14,901	15,526
Basic earnings per common share (in dollars per share)	$ 1.84	$ 1.47	$ 4.75	$ 4.13
Diluted earnings per share (in dollars per share)	$ 1.83	$ 1.47	$ 4.75	$ 4.13