Earnings Per Share of Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Basic earnings per share of common stock:
Net income attributable to common stockholders	$ 306,243	$ 46,135
Weighted-average common stock outstanding (in shares)	78,689	77,653
Basic earnings per share of common stock (in dollars per share)	$ 3.89	$ 0.59
Diluted earnings per share of common stock:
Net income attributable to common stockholders	$ 306,243	$ 46,135
Weighted-average common stock outstanding applicable to basic earnings per share (in shares)	78,689	77,653
Effect of dilutive shares:
Common shares issuable under stock-based compensation plans (in shares)	3,319	1,633
Weighted-average shares of common stock applicable to diluted earnings per share (in shares)	82,008	79,286
Diluted earnings per share of common stock (in dollars per share)	$ 3.73	$ 0.58
Total anti-dilutive shares and units (in shares)	384	2,046
Performance-based RSUs
Effect of dilutive shares:
Total anti-dilutive shares and units (in shares)	162	1,279
Time-based RSUs
Effect of dilutive shares:
Total anti-dilutive shares and units (in shares)	117	61
Stock Options
Effect of dilutive shares:
Total anti-dilutive shares and units (in shares)	105	706
Weighted-average exercise price of anti-dilutive stock options (in dollars per share)	$ 35.03	$ 24.26