Nature of Operations and Summary of Significant Accounting Policies - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Nature of Operations and Summary of Significant Accounting Policies
Net income and net income available to common shareholders	$ 67,800	$ 75,948	$ 74,627
Average common shares outstanding (in shares)	11,992	12,516	13,558
Average common share stock options outstanding	88	91	116
Average diluted common shares	12,080	12,607	13,674
Earnings per common share - basic	$ 5.65	$ 6.07	$ 5.50
Earnings per common share - diluted	$ 5.61	$ 6.02	$ 5.46