Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator [Abstract]
Net income	$ 19,728	$ 23,618
Basic earnings per share [Abstract]
Weighted average shares (in shares)	17,820,000	17,774,000
Diluted earnings per share [Abstract]
Effect of dilutive stock options and restricted stock grants (in shares)	12,000	13,000
Adjusted weighted average shares (in shares)	17,832,000	17,787,000
Earnings per share [Abstract]
Basic earnings per share (in dollars per share)	$ 1.11	$ 1.33
Diluted earnings per share (in dollars per share)	$ 1.11	$ 1.33
Options [Member]
Earnings Per Share [Abstract]
Options excluded from diluted calculations (in shares)	0	0