Earnings Per Share - Schedule of Reconciliation from Basic to Diluted Average Common Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net income	$ 27,405	$ 34,915	$ 87,849	$ 104,638
Average Common Shares:
Basic (weighted-average outstanding shares) (in shares)	11,977	11,928	11,965	11,916
Dilutive potential common shares from stock options (in shares)	64	68	70	67
Diluted (weighted-average outstanding shares) (in shares)	12,041	11,996	12,035	11,983
Basic earnings per share (in dollars per share)	$ 2.29	$ 2.93	$ 7.34	$ 8.78
Diluted earnings per share (in dollars per share)	$ 2.28	$ 2.91	$ 7.30	$ 8.73