Shareholders' Equity and Earnings Per Common Share - Earnings Per Share Reconciliation (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 Reconciliation [Abstract]
Net income	$ 13,810	$ 17,543	$ 48,329	$ 45,324
Weighted average shares outstanding (in shares)	20,896	20,922	20,892	21,021
Stock units for deferred compensation plan for non-employee directors (in shares)	182	163	178	157
Performance share units (in shares)	34	21	27	17
Effect of stock options (in shares)	3	8	3	12
Weighted average shares outstanding for calculation of diluted earnings per share (in shares)	21,115	21,114	21,100	21,207
Net income per common share
Basic (in dollars per share)	$ 0.66	$ 0.84	$ 2.31	$ 2.16
Diluted (in dollars per share)	$ 0.65	$ 0.83	$ 2.29	$ 2.14