Stock Compensation Plans - Stock Purchase Plan (Details) - Stock Purchase Plan - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Stock purchase plan
Purchase price of shares in terms compared to market price per share (as a percent)	90.00%
Annual purchase limitation per employee (in dollars per employee)	$ 22,500
Compensation expense	$ 0
Common stock, shares authorized (in shares)	2,000,000
Shares sold to employees (in shares)	48,990	37,725
Value of shares sold to employees under purchase plan	$ 3,200,000	$ 2,600,000
Shares available (in shares)	217,785