Fair Value Measurements (Outstanding Borrowings) (Details) - USD ($) $ in Thousands	Sep. 29, 2015	Dec. 30, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value	$ 592,302	$ 595,421
Fair Value, Measurements, Recurring | Level 2 Inputs
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instruments at fair value	593,868	587,881
Fair Value, Measurements, Recurring | Level 2 Inputs | Term Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instruments at fair value	396,268	391,231
Fair Value, Measurements, Recurring | Level 2 Inputs | Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instruments at fair value	197,600	196,650
Fair Value, Measurements, Recurring | Level 2 Inputs | Revolving Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instruments at fair value	$ 0	$ 0