Stock-Based Compensation, Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Shares [Roll Forward]
Exercised (in shares)	(700,000)	(400,000)	0
Stock Options [Member]
Number of Shares [Roll Forward]
Outstanding at beginning of year (in shares)	3,168,600
Granted (in shares)	877,900
Exercised (in shares)	(486,400)
Forfeited/cancelled/expired (in shares)	(801,800)
Outstanding at end of year (in shares)	2,758,300	3,168,600
Exercisable at end of year (in shares)	1,512,800
Weighted-Average Exercise Price [Roll Forward]
Outstanding at beginning of year (in dollars per share)	$ 44.76
Granted (in dollars per share)	41.68
Exercised (in dollars per share)	34.23
Forfeited/cancelled/expired (in dollars per share)	64.53
Outstanding at end of year (in dollars per share)	39.90	$ 44.76
Exercisable at end of year (in dollars per share)	$ 38.79
Remaining Contractual Term and Aggregate Intrinsic Value [Abstract]
Outstanding options, weighted-average remaining contractual term	3 years 11 months 12 days
Outstanding options, aggregate intrinsic value	$ 35,657
Exercisable options, weighted-average remaining contractual term	2 years 8 months 19 days
Exercisable options, aggregate intrinsic value	$ 21,665
Service-Based Options [Member]
Number of Shares [Roll Forward]
Outstanding at beginning of year (in shares)	770,600
Granted (in shares)	0
Exercised (in shares)	(188,800)
Forfeited/cancelled/expired (in shares)	(43,600)
Outstanding at end of year (in shares)	538,200	770,600
Exercisable at end of year (in shares)	538,200
Weighted-Average Exercise Price [Roll Forward]
Outstanding at beginning of year (in dollars per share)	$ 38.71
Granted (in dollars per share)	0
Exercised (in dollars per share)	37.74
Forfeited/cancelled/expired (in dollars per share)	77.71
Outstanding at end of year (in dollars per share)	35.89	$ 38.71
Exercisable at end of year (in dollars per share)	$ 35.89
Remaining Contractual Term and Aggregate Intrinsic Value [Abstract]
Outstanding options, weighted-average remaining contractual term	1 year 1 month 24 days
Outstanding options, aggregate intrinsic value	$ 8,303
Exercisable options, weighted-average remaining contractual term	1 year 1 month 24 days
Exercisable options, aggregate intrinsic value	$ 8,303
Performance-Based Options [Member]
Number of Shares [Roll Forward]
Outstanding at beginning of year (in shares)	2,398,000.0
Granted (in shares)	877,900
Exercised (in shares)	(297,600)
Forfeited/cancelled/expired (in shares)	(758,200)
Outstanding at end of year (in shares)	2,220,100	2,398,000.0
Exercisable at end of year (in shares)	974,600
Weighted-Average Exercise Price [Roll Forward]
Outstanding at beginning of year (in dollars per share)	$ 46.71
Granted (in dollars per share)	41.68
Exercised (in dollars per share)	32.00
Forfeited/cancelled/expired (in dollars per share)	63.77
Outstanding at end of year (in dollars per share)	40.87	$ 46.71
Exercisable at end of year (in dollars per share)	$ 40.39
Remaining Contractual Term and Aggregate Intrinsic Value [Abstract]
Outstanding options, weighted-average remaining contractual term	4 years 7 months 13 days
Outstanding options, aggregate intrinsic value	$ 27,353
Exercisable options, weighted-average remaining contractual term	3 years 7 months 2 days
Exercisable options, aggregate intrinsic value	$ 13,361