Earnings Per Share - Calculation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income	$ 33,349	$ 18,470
Average Common Shares:
Basic (weighted-average outstanding shares) (in shares)	11,899	11,860
Dilutive potential common shares from stock options (in shares)	63	56
Diluted (weighted-average outstanding shares) (in shares)	11,962	11,916
Basic earnings per share (in dollars per share)	$ 2.80	$ 1.56
Diluted earnings per share (in dollars per share)	$ 2.79	$ 1.55