Debt - Summary of Debt Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Term note payable—domestic, net of discounts	$ 2,671,875	$ 2,157,376
Other debt	10,929	3,624
Total notes payable and other obligations	3,280,120	2,321,000
Securitization facility	656,000	614,000
Total notes payable, credit agreements and Securitization Facility	3,936,120	2,935,000
Current portion	1,383,763	875,100
Long-term portion	2,552,357	2,059,900
Revolving line of credit A Facility—domestic
Debt Instrument [Line Items]
Revolving line of credit	430,000	160,000
Revolving line of credit A Facility—foreign
Debt Instrument [Line Items]
Revolving line of credit	162,128	0
Revolving line of credit A Facility—swing line
Debt Instrument [Line Items]
Revolving line of credit	$ 5,188	$ 0