Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Numerator [Abstract]
Net income	$ 78,004	$ 81,814	$ 87,939
Basic earnings per share [Abstract]
Weighted average shares (in shares)	17,887,000	17,836,000	17,786,000
Diluted earnings per share [Abstract]
Dilutive effect of equity grants (in shares)	13,000	15,000	18,000
Adjusted weighted average shares (in shares)	17,900,000	17,851,000	17,804,000
Earnings per share [Abstract]
Basic earnings per share (in dollars per share)	$ 4.36	$ 4.59	$ 4.94
Diluted earnings per share (in dollars per share)	$ 4.36	$ 4.58	$ 4.94
Options [Member]
Earnings Per Share [Abstract]
Options excluded from diluted calculations (in shares)	0	0	0