Shareholders' Equity and Earnings Per Common Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share Reconciliation [Abstract]
Net income	$ 14,790	$ 13,001	$ 27,781	$ 30,968
Weighted average shares outstanding (in shares)	21,041	21,070	21,072	21,131
Stock units for deferred compensation plan for non-employee directors (in shares)	156	133	154	131
Effect of stock options (in shares)	8	42	14	49
Performance share units (in shares)	18	21	20	23
Weighted average shares outstanding for calculation of diluted earnings per share (in shares)	21,223	21,266	21,260	21,334
Net income per common share
Basic (in dollars per share)	$ 0.70	$ 0.62	$ 1.32	$ 1.47
Diluted (in dollars per share)	$ 0.70	$ 0.61	$ 1.31	$ 1.45