Share-Based Compensation - Share-based compensation expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	$ 86,580	$ 69,892	$ 63,848
Share based compensation expense, net of tax	75,667	60,345	55,502
Options and SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	12,316	11,744	12,866
Share based compensation expense, net of tax	10,927	10,388	11,450
Restricted Common Shares And Restricted Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	46,817	41,284	38,988
Share based compensation expense, net of tax	39,349	34,599	32,999
Performance Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	23,696	14,729	8,949
Share based compensation expense, net of tax	21,920	13,380	8,295
Employee Share Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	3,751	2,135	3,045
Share based compensation expense, net of tax	$ 3,471	$ 1,978	$ 2,758