Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 29,809	$ 29,839	$ 88,447	$ 86,913
Less: earnings allocated to participating securities	(278)	(281)	(823)	(813)
Net earnings allocated to common shareholders	29,531	29,558	87,624	86,100
Distributed earnings allocated to common stock	11,506	10,554	32,333	29,744
Undistributed earnings allocated to common stock	$ 18,025	$ 19,004	$ 55,291	$ 56,356
Average shares outstanding (in shares)	14,633	14,922	14,691	14,906
Effect of dilutive securities:
Employee stock awards (in shares)	21	23	20	22
Average shares outstanding, diluted (in shares)	14,654	14,945	14,711	14,928
Basic earnings per common share (in dollars per share)	$ 2.02	$ 1.98	$ 5.96	$ 5.78
Diluted earnings per share (in dollars per share)	$ 2.02	$ 1.98	$ 5.96	$ 5.77