Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator [Abstract]
Net income	$ 19,372	$ 21,142	$ 59,371	$ 68,691
Basic earnings per share [Abstract]
Weighted average shares (in shares)	17,841,000	17,790,000	17,832,000	17,783,000
Diluted earnings per share [Abstract]
Effect of dilutive stock options and restricted stock grants (in shares)	16,000	18,000	12,000	15,000
Adjusted weighted average shares (in shares)	17,857,000	17,808,000	17,844,000	17,798,000
Earnings per share [Abstract]
Basic earnings per share (in dollars per share)	$ 1.09	$ 1.19	$ 3.33	$ 3.86
Diluted earnings per share (in dollars per share)	$ 1.08	$ 1.19	$ 3.33	$ 3.86
Options [Member]
Earnings Per Share [Abstract]
Options excluded from diluted calculations (in shares)	0	0	0	0