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Debt (Tables) | 12 Months Ended
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Dec. 28, 2018
Debt Disclosure [Abstract] |
Schedule of Debt | Long-term debt is comprised of the following (in thousands):
| December 28, 2018 |  | December 29, 2017
Senior secured term loan A | $ | 304,687 |  |  | $ | 335,157 |
Senior secured term loan B | 632,286 |  |  | 873,286 |
9.125% senior notes due 2023 | — |  |  | 360,000 |
Revolving line of credit | 5,000 |  |  | 74,000 |
Unamortized discount on term loan B and debt issuance costs | (16,466 | ) |  | (33,278 | )
Total debt | 925,507 |  |  | 1,609,165 |
Current portion of long-term debt | (37,500 | ) |  | (30,469 | )
Total long-term debt | $ | 888,007 |  |  | $ | 1,578,696 |
Schedule of Maturities of Long-term Debt | Contractual maturities of the Company’s debt facilities for the next five years and thereafter, excluding any discounts or premiums, as of December 28, 2018 are as follows (in thousands):
| 2019 |  | 2020 |  | 2021 |  | 2022 |  | After 2022
Future minimum principal payments | $ | 37,500 |  |  | 42,500 |  |  | 229,687 |  |  | 632,286 |  |  | — |
Schedule of Deferred Financing Costs | The change in deferred debt issuance costs related to the Company’s Revolving Credit Facility is as follows (in thousands):
December 30, 2016 | $ | 3,800 |
Amortization during the period | (992 | )
December 29, 2017 | 2,808 |
Amortization during the period | (991 | )
December 28, 2018 | $ | 1,817 |
The change in unamortized discount and debt issuance costs related to the Term Loan Facilities and Senior Notes is as follows (in thousands):
| Debt Issuance Costs |  | Unamortized Discount on TLB Facility |  | Total
December 30, 2016 | $ | 32,096 |  |  | $ | 8,741 |  |  | $ | 40,837 |
Financing costs incurred | 2,360 |  |  | — |  |  | 2,360 |
Write-off of debt issuance costs and unamortized discount(1) | (2,421 | ) |  | (1,104 | ) |  | (3,525 | )
Amortization during the period | (5,146 | ) |  | (1,248 | ) |  | (6,394 | )
December 29, 2017 | 26,889 |  |  | 6,389 |  |  | 33,278 |
Write-off of debt issuance costs and unamortized discount(1) | (9,757 | ) |  | (1,610 | ) |  | (11,367 | )
Amortization during the period | (4,419 | ) |  | (1,026 | ) |  | (5,445 | )
December 28, 2018 | $ | 12,713 |  |  | $ | 3,753 |  |  | $ | 16,466 |
Schedule of Interest Rate Derivatives | regarding the Company’s outstanding interest rate swap designated as a cash flow hedge as of December 28, 2018 is as follows (dollars in thousands):
Notional Amount |  | Start Date |  | End Date |  | Pay Fixed Rate |  | Receive Current Floating Rate |  | Fair Value |  | Balance Sheet Location
$ | 200,000 |  |  | Jun-17 |  | Jun-20 |  | 1.1325 | % |  | 2.5063% |  | $ | 4,171 |  |  | Other Assets
The estima

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