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Revolving Credit Facilities and Long-Term Debt - Revolving Credit Facilities and Long-Term Debt (Details) |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 29, 2015 USD ($) | Sep. 24, 2016 USD ($) | Sep. 26, 2015 USD ($) | Sep. 24, 2016 USD ($) | Sep. 26, 2015 USD ($) | Mar. 26, 2016 USD ($) | Feb. 23, 2015 USD ($)
February 2015 Wells Fargo Bank credit facility |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Existing indebtedness refinanced | $ 150,000,000 |  |  |  |  |  |
Transaction fee paid |  |  |  |  |  |  | $ 1,400,000
February 2015 Wells Fargo Bank credit facility | Interest expense |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Deferred loan fees written off | 1,400,000 |  |  |  |  |  |
Wells Fargo Bank revolving credit facility |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Current borrowing capacity |  |  |  |  |  |  | 75,000,000
Wells Fargo Bank letters of credit |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Current borrowing capacity |  |  |  |  |  |  | 5,000,000
Wells Fargo Bank term loan |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  | 75,000,000
Additional incremental term loan capacity |  |  |  |  |  |  | $ 50,000,000
Term loan |  | $ 197,500,000 |  | $ 197,500,000 |  | $ 198,500,000 |
Unamortized value of the debt issuance costs and debt discount |  | (4,411,000) |  | (4,411,000) |  | (4,886,000) |
Total |  | 193,089,000 |  | 193,089,000 |  | 193,614,000 |
2015 Golub Term Loan |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Principal amount | $ 200,000,000 |  |  |  |  |  |
Interest expense |  | $ 2,700,000 |  | $ 5,500,000 |  |  |
Weighted average interest rate (as a percent) |  | 5.50% |  | 5.50% |  |  |
Required payment frequency | Quarterly |  |  |  |  |  |
Periodic payment | $ 500,000 |  |  |  |  |  |
Additional interest rate required if certain triggering events come into existence (as a percent) | 2.00% |  |  |  |  |  |
Deferred loan fees | $ 5,600,000 | $ 4,400,000 |  | $ 4,400,000 |  | 4,900,000 |
Total |  | 197,500,000 |  | $ 197,500,000 |  |  |
2015 Golub Term Loan | Base rate |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Basis margin (as a percent) | 3.50% |  |  |  |  |  |
2015 Golub Term Loan | Federal funds rate |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Basis margin (as a percent) | 0.50% |  |  |  |  |  |
2015 Golub Term Loan | One-month LIBOR rate |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Basis margin (as a percent) | 1.00% |  |  |  |  |  |
2015 Golub Term Loan | LIBOR |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Basis margin (as a percent) | 4.50% |  |  |  |  |  |
LIBOR floor rate | 1.00% |  |  |  |  |  |
2015 Golub Term Loan | Maximum |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Consolidated total net leverage ratio |  |  |  | 4.75 |  |  |
2015 Golub Term Loan | Leverage ratio as of December 24, 2016 | Maximum |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Consolidated total net leverage ratio |  |  |  | 4.50 |  |  |
2015 Golub Term Loan | Leverage ratio as of April 1, 2017 | Maximum |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Consolidated total net leverage ratio |  |  |  | 4.25 |  |  |
2015 Golub Term Loan | Leverage ratio subsequent to September 30, 2017 | Maximum |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Consolidated total net leverage ratio |  |  |  | 4.00 |  |  |
June 2015 Wells Fargo Revolver |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Borrowing capacity | $ 125,000,000 |  |  |  |  |  |
Commitment fee on unused capacity (as a percentage) | 0.25% |  |  |  |  |  |
Amount outstanding under 2015 Wells Fargo Revolver |  | 57,000,000 |  | $ 57,000,000 |  | 48,800,000 |
Interest expense |  | $ 400,000 |  | $ 700,000 |  |  |
Weighted average interest rate (as a percent) |  | 1.80% |  | 1.80% |  |  |
Additional interest rate required if certain triggering events come into existence (as a percent) | 2.00% |  |  |  |  |  |
Deferred loan fees | $ 900,000 | $ 700,000 |  | $ 700,000 |  | $ 800,000 |
June 2015 Wells Fargo Revolver | Federal funds rate |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Basis margin (as a percent) | 0.50% |  |  |  |  |  |
June 2015 Wells Fargo Revolver | One-month LIBOR rate |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Basis margin (as a percent) | 1.00% |  |  |  |  |  |
June 2015 Wells Fargo Revolver | Minimum |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Consolidated fixed charge coverage ratio | 1.00 |  |  |  |  |  |
June 2015 Wells Fargo Revolver | Minimum | Base rate |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Basis margin (as a percent) | 0.00% |  |  |  |  |  |
June 2015 Wells Fargo Revolver | Minimum | LIBOR |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Basis margin (as a percent) | 1.00% |  |  |  |  |  |
June 2015 Wells Fargo Revolver | Maximum | Base rate |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Basis margin (as a percent) | 0.25% |  |  |  |  |  |
June 2015 Wells Fargo Revolver | Maximum | LIBOR |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Basis margin (as a percent) | 1.25% |  |  |  |  |  |
June 2015 Wells Fargo Revolver | February 2015 Wells Fargo Bank credit facility |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Interest expense |  |  |  |  | $ 800,000 |  |
Weighted average interest rate (as a percent) |  |  | 4.09% |  | 4.09% |  |
June 2015 Wells Fargo Revolver | 2015 Golub Term Loan | Interest expense |  |  |  |  |  |  |
Revolving credit facilities and long-term debt |  |  |  |  |  |  |
Amortization of deferred loan fees |  | $ 300,000 | $ 300,000 | $ 600,000 | $ 300,000 |  |

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