Earnings Per Share - Components of Basic and Diluted Net Income Per Common Share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Basic net income per common share available to common stockholders:
Net income available to common stockholders	$ 72,952,000	$ 51,490,000	$ 45,270,000
Weighted average common shares outstanding	20,169,077	17,886,998	16,716,880
Basic earnings per common share	$ 3.62	$ 2.88	$ 2.71
Diluted net income per common share available to common stockholders:
Net income available to common stockholders	$ 72,952,000	$ 51,490,000	$ 45,270,000
Weighted average common shares outstanding	20,169,077	17,886,998	16,716,880
Dilutive potential common shares:
Restricted stock awarded	74,558	52,009	45,976
Dilutive potential common shares	74,558	52,009	45,976
Diluted weighted average common shares outstanding	20,243,635	17,939,007	16,762,856
Diluted earnings per common share	$ 3.60	$ 2.87	$ 2.70