Stock Based Compensation - Nonvested Stock Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Number of Options
Nonvested options at beginning of year (in shares)	1,060,703
Granted (in shares)	322,460	368,780	798,970
Vested (in shares)	(559,150)
Forfeited (in shares)	(17,959)
Nonvested options at end of year (in shares)	806,054	1,060,703
Weighted Avg. Per Share Exercise Price
Nonvested options at beginning of year (in dollars per share)	$ 49.99
Granted (in dollars per share)	74.11	$ 60.85	$ 42.50
Vested (in dollars per share)	48.73
Forfeited (in dollars per share)	61.83
Nonvested options at end of year (in dollars per share)	$ 60.26	$ 49.99