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Debt - Maturities (Details) - USD ($) $ in Thousands | Dec. 30, 2017 | Dec. 31, 2016
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Maturities of Long-term Debt [Abstract] |  |
2018 | $ 16,659 |
2019 | 8,617 |
2020 | 457,519 |
2021 | 107,432 |
2022 | 32,906 |
Thereafter | 301,282 |
Total Long-term debt | 924,415 | $ 781,380
Private Placement Facilities [Member] |  |
Maturities of Long-term Debt [Abstract] |  |
Total Long-term debt | 535,295 | $ 342,857
Debt Instrument [Line Items] |  |
Debt Issuance Costs, Gross | $ 419 |

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- Definition Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 + Details
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- Definition Amount of long-term debt and capital lease obligations including current maturities. + References No definition available. + Details
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