Subsequent Events (Details) $ in Thousands			1 Months Ended
	Oct. 19, 2015 USD ($)	Oct. 16, 2015 USD ($) credit_facility	May. 31, 2014	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Subsequent Event [Line Items]
Face Value				$ 2,270,300	$ 2,005,300
Credit facility, term			5 years
Term loan				$ 2,215,665	$ 1,951,013
Subsequent Event [Member]
Subsequent Event [Line Items]
Number of credit facilities | credit_facility		2
Accounts Receivable Securitization Program [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Termination of accounts receivable securitization program	$ 50,000
Term Loans [Member] | Unsecured 364-day Taxable Term Loan [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Face Value		$ 91,850
Credit facility, term		364 days
Term loan		$ 50,000