Fair Value Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Feb. 14, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	$ 936,800
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term interest rate swap liability	0	[1]
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term interest rate swap liability	908	[1]
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term interest rate swap liability	0	[1]
Term Loan, due 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	619,030	[2]		0	[2]
Fair Value	638,392	[2],[3]		0	[2],[3]
Unamortized Discount	17,770	[2],[4]	17,800	0	[4]
Senior Secured Notes due 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	300,000			0
Fair Value	301,500	[3]		0	[3]
Old Term Loan Due 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	0			957,000
Fair Value	$ 0	[3]		$ 929,500	[3]

[1] The fair value is determined using valuation models which rely on the expected LIBOR based yield curve and estimates of counterparty and the Company’s non-performance risk. Because each of these inputs are directly observable or can be corroborated by observable market data, we have categorized these interest rate swaps as Level 2 within the fair value hierarchy.

[2] The carrying amount of the New Term Loan is net of the discount of $17.8 million.

[3] The Company estimated fair value based on market prices of the Company's debt securities at the balance sheet date, which falls within Level 2 of the fair value hierarchy.

[4] The $17.8 million discount on the New Term Loan (as defined below) is being amortized using the effective interest method over the term of the senior secured credit facility due 2019.