Earnings Per Share Level 4 (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Income (Loss) Attributable to Parent [Abstract]
Net income attributable to common stockholders	$ 127,415	$ 70,792	$ 314,864	$ 222,444
Weighted average shares (denominator):
Weighted average shares — basic	175,982	182,551	178,238	182,218
Weighted average shares — diluted	178,140	185,843	180,463	185,635
Net income attributable to common stockholders, basic	$ 0.72	$ 0.39	$ 1.77	$ 1.22
Net income attributable to common stockholders, diluted	$ 0.72	$ 0.38	$ 1.74	$ 1.20
Revenues	$ 918,241	$ 769,241	$ 2,541,241	$ 2,380,025
Stock Options [Member]
Weighted average shares (denominator):
Share based compensation	2,115	3,225	2,184	3,370
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,739,000	785,000	1,572,000	641,000
Restricted Stock Units (RSUs) [Member]
Weighted average shares (denominator):
Share based compensation	43	67	41	47
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0	54,000	58,000