Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator [Abstract]
Net income	$ 20,628	$ 19,372	$ 59,345	$ 59,371
Basic earnings per share [Abstract]
Weighted average shares (in shares)	17,893,000	17,841,000	17,882,000	17,832,000
Diluted earnings per share [Abstract]
Effect of dilutive stock options and restricted stock grants (in shares)	11,000	16,000	10,000	12,000
Adjusted weighted average shares (in shares)	17,904,000	17,857,000	17,892,000	17,844,000
Earnings per share [Abstract]
Basic earnings per share (in dollars per share)	$ 1.15	$ 1.09	$ 3.32	$ 3.33
Diluted earnings per share (in dollars per share)	$ 1.15	$ 1.08	$ 3.32	$ 3.33
Options [Member]
Earnings Per Share [Abstract]
Options excluded from diluted calculations (in shares)	0	0	0	0