Fair Value Measurements - Fair Value of Assets and Liabilities Measured on Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Sep. 28, 2012
Senior Notes [Member] | 7.375% Senior Notes Due 2020 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt interest rate	7.375%	7.375%	7.375%
Successor [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate bonds		3,541
Cash and Cash Equivalents, Fair Value Disclosure	100,002	66,782
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Term Loan [Member] | 7 Year Senior Secured Term Loan Facility [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	1,399,941	1,063,255
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Senior Notes [Member] | 7.375% Senior Notes Due 2020 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	507,763	507,150
Derivative instruments - Interest rate caps	5,700	1,189
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate bonds		0
Cash and Cash Equivalents, Fair Value Disclosure	100,002	66,782
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Term Loan [Member] | 7 Year Senior Secured Term Loan Facility [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Senior Notes [Member] | 7.375% Senior Notes Due 2020 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Derivative instruments - Interest rate caps	0	0
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate bonds		3,541
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Term Loan [Member] | 7 Year Senior Secured Term Loan Facility [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	1,399,941	1,063,255
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Senior Notes [Member] | 7.375% Senior Notes Due 2020 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	507,800	507,150
Derivative instruments - Interest rate caps	5,700	1,189
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Corporate bonds		0
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Term Loan [Member] | 7 Year Senior Secured Term Loan Facility [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Successor [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Senior Notes [Member] | 7.375% Senior Notes Due 2020 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, fair value	0	0
Derivative instruments - Interest rate caps	0	0