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, 2022	Dec. 31, 2021	Dec. 31, 2020
Nature of Operations and Summary of Significant Accounting Policies
Net income and net income available to common shareholders	$ 75,948	$ 74,627	$ 59,313
Average common shares outstanding	12,516	13,558	14,043
Average common share stock options outstanding	91	116	61
Average diluted common shares	12,607	13,674	14,104
Earnings per common share - basic	$ 6.07	$ 5.50	$ 4.22
Earnings per common share - diluted	$ 6.02	$ 5.46	$ 4.21