Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	$ 1,587,289			$ 1,563,799			$ 4,147,591	$ 3,958,563
Operating Expenses	1,383,578			1,374,329			3,748,555	3,607,563
Net income	153,078	$ 99,703	$ 25,130	137,637	$ 61,825	$ 40,926	277,911	240,388
Receivables, net	$ 1,009,433			$ 968,279			$ 1,009,433	$ 968,279	$ 836,605
Restatement Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues			(7,700)
Operating Expenses			(1,200)
Net income			(6,700)
Accounts Payable			(1,200)
Receivables, net			$ (7,700)