Share-Based Compensation Plans - Company's restricted stock award activities (Details) - Restricted stock	3 Months Ended
	Mar. 31, 2023 USD ($) $ / shares shares
Share-Based Compensation Plans
Shares of Restricted Stock, Non-vested beginning of period | shares	71,808
Shares of Restricted Stock, Vested | shares	(150)
Shares of Restricted Stock, Non-vested end of period | shares	71,658
Weighted Average Grant Date Fair Value, Non-vested beginning of period (in dollars per share)	$ 24.67
Weighted Average Grant Date Fair Value, Vested (in dollars per share)	28.77
Weighted Average Grant Date Fair Value, Non-vested end of period (in dollars per share)	$ 24.66
Weighted Average Remaining Contractual Term (Years)	2 years 4 months 24 days
Fair market value of options granted (in dollars per share)	$ 25.30
Aggregate intrinsic value | $	$ 1,813,000