Share-Based Compensation - Summary of Restricted Stock and Performance Units Activity (Details) - $ / shares		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restricted Stock
Restricted Stock and Performance Units [Roll Forward]
Outstanding at January 1		669,102	716,952	743,591
Granted		173,970	204,960	199,499
Vested	[1]	(182,779)	(244,823)	(212,809)
Forfeitures		(8,845)	(7,987)	(13,329)
Outstanding at December 31		651,448	669,102	716,952
Restricted Stock and Performance Units (Weighted Average Grant-date Fair Value) [Abstract]
Weighted Average Grant-Date Fair Value, Outstanding at January 1		$ 102.55	$ 94.50	$ 86.90
Weighted Average Grant-Date Fair Value, Granted		134.10	94.25	95.48
Weighted Average Grant-Date Fair Value, Vested	[1]	108.59	72.11	68.59
Weighted Average Grant-Date Fair Value, Forfeitures		111.73	99.94	98.86
Weighted Average Grant-Date Fair Value, Outstanding at December 31		$ 109.16	$ 102.55	$ 94.50
Performance Units
Restricted Stock and Performance Units [Roll Forward]
Outstanding at January 1		357,417	323,147	266,704
Granted		95,236	111,287	109,545
Vested		(74,894)	(77,017)	(53,102)
Forfeitures		(19,667)	0	0
Outstanding at December 31		358,092	357,417	323,147
Restricted Stock and Performance Units (Weighted Average Grant-date Fair Value) [Abstract]
Weighted Average Grant-Date Fair Value, Outstanding at January 1		$ 103.63	$ 96.56	$ 90.01
Weighted Average Grant-Date Fair Value, Granted		140.47	99.20	97.24
Weighted Average Grant-Date Fair Value, Vested		134.53	67.57	65.03
Weighted Average Grant-Date Fair Value, Forfeitures		132.58	0	0
Weighted Average Grant-Date Fair Value, Outstanding at December 31		$ 105.38	$ 103.63	$ 96.56

[1] The total fair value of awards upon vesting for the years ended December 31, 2021, 2020, and 2019 was $24.8 million, $23.6 million, and $19.9 million, respectively.