Debt (Schedule of Debt) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term debt	$ 1,929,462	$ 1,545,340
Less unamortized debt discount to senior secured term loan	(7,656)	(7,821)
Less current portion	(14,503)	(21,462)
Long-term debt	1,907,303	1,516,057
Term Loan [Member] | 7 Year Senior Secured Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term debt	1,439,462	1,055,340
Revolving Credit Facility [Member] | 5 Year Senior Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt	0	0
Senior Notes [Member] | 7.375% Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 490,000	$ 490,000