Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Diluted earnings per share of common stock:
Net Income (Loss)	$ 58,250	$ 129,163	$ 88,628	$ 302,756
Weighted-average common stock outstanding applicable to basic earnings per share (in shares)	49,874	54,167	50,013	54,995
Effect of dilutive shares:
Common shares issuable under stock-based compensation plans (in shares)	2,390	2,475	2,790	2,897
Weighted-average shares of common stock applicable to diluted earnings per share (in shares)	52,264	56,642	52,803	57,892
Basic earnings per share of common stock (in dollars per share)	$ 1.17	$ 2.38	$ 1.77	$ 5.51
Diluted earnings per share of common stock (in dollars per share)	$ 1.11	$ 2.28	$ 1.68	$ 5.23
Total anti-dilutive shares and units (in shares)	1,079	2,076	1,059	1,901
Performance-based RSUs
Effect of dilutive shares:
Total anti-dilutive shares and units (in shares)	608	508	520	412
Time-based RSUs
Effect of dilutive shares:
Total anti-dilutive shares and units (in shares)	1	144	129	233
Employee Stock Option [Member]
Effect of dilutive shares:
Total anti-dilutive shares and units (in shares)	470	1,424	410	1,256
Weighted-average exercise price of anti-dilutive stock options (in dollars per share)	$ 58.92	$ 58.49	$ 58.62	$ 58.68