Share-based Compensation - Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock options
Options Outstanding
Balance at beginning of year (in shares)	313,480	394,089	761,686
Granted (in shares)	0	0	0
Exercised (in shares)	0	0	(11,314)
Lapsed or cancelled (in shares)	(197,500)	(80,609)	(356,283)
Balance at end of period (in shares)	115,980	313,480	394,089
Options exercisable at end of period (in shares)	115,980	313,480	394,089
Weighted Average Exercise Price
Balance at beginning of year (in dollars per share)	$ 97.59	$ 100.56	$ 105.76
Exercised (in dollars per share)	0	0	72.30
Lapsed or cancelled (in dollars per share)	84.14	112.14	112.56
Balance at end of period (in dollars per share)	103.52	97.59	100.56
Options exercisable at end of period (in dollars per share)	$ 103.52	$ 97.59	$ 100.56
Restricted Stock Awards
Summary of restricted stock
Balance at beginning of year (in shares)	3,758,174	3,459,363	3,337,545
Granted (in shares)	337,350	314,995	141,515
Cancelled (in shares)	(6,350)	(16,184)	(19,697)
Balance at end of period (in shares)	4,089,174	3,758,174	3,459,363
Vested during the period (in shares)	147,915	118,255	122,759
Compensation expense recorded	$ 7,766,055	$ 10,133,905	$ 8,497,054