Earnings Per Share Level 4 (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net Income (Loss) Attributable to Parent [Abstract]
Net income attributable to common stockholders	$ 105,508	$ 72,329	$ 187,449	$ 151,652
Weighted average shares (denominator):
Weighted average shares — basic	177,902	182,369	179,378	182,048
Weighted average shares — diluted	179,666	185,690	181,639	185,517
Net income attributable to common stockholders, basic	$ 0.59	$ 0.40	$ 1.04	$ 0.83
Net income attributable to common stockholders, diluted	$ 0.59	$ 0.39	$ 1.03	$ 0.82
Revenues	$ 820,035	$ 812,572	$ 1,623,000	$ 1,610,784
Stock Options [Member]
Weighted average shares (denominator):
Share based compensation	1,740	3,278	2,221	3,418
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,706,000	105,000	1,486,000	0
Restricted Stock Units (RSUs) [Member]
Weighted average shares (denominator):
Share based compensation	24	43	40	51
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	67,000	0	49,000	0