Debt (Schedule of Debt) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term debt	$ 1,931,678	$ 1,545,340
Less unamortized debt discount to senior secured term loan	(8,444)	(7,821)
Less current portion	(9,467)	(21,462)
Long-term debt	1,913,767	1,516,057
Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt	1,441,678	1,055,340
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