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Indebtedness and Interest Expense - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jul. 01, 2018
Jun. 30, 2019
Jul. 01, 2018
Dec. 30, 2018
Debt Instrument [Line Items]          
Long-term Debt, Excluding Current Maturities $ 959,874,000   $ 959,874,000   $ 961,514,000
Long-term Debt, Gross 975,100,000   975,100,000   978,900,000
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net $ 3,800,000   $ 3,800,000    
LineofCreditUnusedCapacityDocumentaryandProcessingFee     0.00%    
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Additional Margin on Basis Spread of Variable Rate 3.25%   3.25%    
Term Loan Facility [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Interest Rate During Period       5.60%  
Letter of Credit [Member]          
Debt Instrument [Line Items]          
Letters of Credit Outstanding, Amount         9,000,000
The Senior Secured Credit Facilities [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Basis Spread on Variable Rate     1.00%    
The Senior Secured Credit Facilities [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Basis Spread on Variable Rate     0.50%    
The Senior Secured Credit Facilities [Member] | Adjusted London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Basis Spread on Variable Rate     1.00%    
Senior Notes [Member]          
Debt Instrument [Line Items]          
Payments of Debt Issuance Costs     $ 6,400,000    
SecuredCreditFacilitiesAndSeniorNotes [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Interest Rate During Period     6.80% 6.30%  
Term Loan Facility [Member]          
Debt Instrument [Line Items]          
Long-term Debt, Gross $ 720,100,000   $ 720,100,000   723,900,000
Interest Expense, Debt 10,577,000 $ 9,681,000 21,243,000 $ 18,800,000  
Term Loan Facility [Member] | Term Loan Facility Maturing 2021 [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Face Amount $ 760,000,000   760,000,000    
Payments of Debt Issuance Costs     $ 17,800,000    
Federal Funds Rate Minimum     2.36%    
Federal Funds Rate Maximum     2.45%    
Libor Rate Minimum     2.38%    
Libor Rate Maximum     2.52%    
Senior Loans [Member] | The Senior Secured Credit Facilities [Member]          
Debt Instrument [Line Items]          
First-Tier Foreign Subsidiaries, Percentage of Capital Stock Securing Obligations 65.00%   65.00%    
The Senior Secured Credit Facilities [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Interest Rate During Period     6.30%    
Unsecured Debt [Member] | Senior Notes due 2022 [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Interest Rate During Period     8.20%    
Revolving Credit Facility [Member] | Senior Debt Obligations [Member] | Senior Secured Revolving Credit Facility, Maturing 2019 [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Face Amount $ 95,000,000   $ 95,000,000    
Revolving Credit Facility [Member] | Senior Debt Obligations [Member] | Senior Secured Revolving Credit Facility, Maturing 2020 [Member] [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Face Amount $ 95,000,000   $ 95,000,000    
Revolving Credit Facility [Member] | Senior Loans [Member] | Swingline Loan Facility, the Revolving Credit Facility [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Covenant Threshold of Percentage Drawn 30.00%   30.00%    
Debt Instrument, Face Amount $ 30,000,000   $ 30,000,000    
Leverage Ratio 1.00   1.00    
Payments of Debt Issuance Costs     $ 3,800,000    
Debt Instrument, Covenant, Leverage Ratio, Maximum 6.25   6.25    
Letter of Credit [Member] | Senior Debt Obligations [Member] | Letter of Credit Sub-Facility [Member]          
Debt Instrument [Line Items]          
Letters of Credit Outstanding, Amount $ 8,500,000   $ 8,500,000    
Minimum [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage     0.00%    
Minimum [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Additional Margin on Basis Spread of Variable Rate 2.75%   2.75%    
Minimum [Member] | The Senior Secured Credit Facilities [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Additional Margin on Basis Spread of Variable Rate 3.00%   3.00%    
Minimum [Member] | Term Loan Facility [Member] | Term Loan Facility Maturing 2021 [Member] | Prime Rate [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Basis Spread on Variable Rate     5.50%    
Maximum [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage     0.00%    
Maximum [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Additional Margin on Basis Spread of Variable Rate 3.00%   3.00%    
Maximum [Member] | Term Loan Facility [Member] | Base Rate [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Additional Margin on Basis Spread of Variable Rate 2.25%   2.25%    
Maximum [Member] | The Senior Secured Credit Facilities [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Additional Margin on Basis Spread of Variable Rate 3.25%   3.25%    
Carrying Amount [Member]          
Debt Instrument [Line Items]          
Long-term Debt, Excluding Current Maturities [1],[2] $ 966,617,000   $ 966,617,000   $ 970,147,000
[1] Excluding net deferred financing costs
[2] Net of original issue discount.