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Debt Obligations - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 1 Months Ended |  | 1 Months Ended |  | 1 Months Ended | 12 Months Ended |  | 1 Months Ended | 9 Months Ended |  |  | 1 Months Ended | 12 Months Ended | 1 Months Ended |  |
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Sep. 27, 2013 | Sep. 28, 2012 | Apr. 17, 2013 Senior Secured Note Installment | Apr. 17, 2013 Senior Secured Note First Payment | Apr. 17, 2013 Senior Secured Note Second Payment | Apr. 17, 2013 Amended And Restated Credit Facility | Sep. 28, 2012 Minimum | Apr. 17, 2013 Minimum Amended And Restated Credit Facility | Sep. 28, 2012 Maximum | Apr. 17, 2013 Maximum Amended And Restated Credit Facility | Dec. 28, 2012 Revolving credit facility | Apr. 17, 2013 Revolving credit facility Amended And Restated Credit Facility | Apr. 17, 2013 Revolving credit facility Minimum Amended And Restated Credit Facility | Apr. 17, 2013 Revolving credit facility Maximum Amended And Restated Credit Facility | Sep. 27, 2013 Mortgage Note | Apr. 26, 2012 Mortgage Note | Apr. 17, 2013 Term Loan Amended And Restated Credit Facility | Apr. 25, 2012 Senior Secured Credit Facility | Dec. 28, 2012 Senior Secured Credit Facility | Apr. 25, 2012 Senior Secured Credit Facility Minimum | Apr. 25, 2012 Senior Secured Credit Facility Maximum | Apr. 17, 2013 Federal Funds Purchased Amended And Restated Credit Facility | Dec. 28, 2012 Federal Funds Purchased Revolving credit facility | Dec. 28, 2012 Federal Funds Purchased Revolving credit facility Maximum
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior secured loan, aggregate amount |  |  |  |  |  |  |  |  |  |  |  | $ 140,000 |  |  |  |  |  | $ 100,000 |  |  |  |  |  |
Additional borrowings | 70,800 | 229,958 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,000 | 40,000 |  |  |
Debt instrument maturity date |  |  |  |  |  | Apr. 25, 2017 |  |  |  |  |  |  |  |  |  |  |  |  | Apr. 25, 2017 |  |  |  |  |
First four quarterly principal payments on term loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000 |  |  |  |  |  |
Principal payments on the term loans |  |  |  |  |  | 1,500 |  |  |  |  |  |  |  |  |  |  |  | 1,500 |  |  |  |  |  |
Federal funds effective rate for overnight borrowings plus |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% | 0.50% | 1.00%
Adjusted LIBO Rate for one month plus, the percentage interest |  |  |  |  |  | 2.50% |  |  |  |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted LIBO Rate for one month plus, the applicable margin in each case |  |  |  |  |  |  |  | 1.75% |  | 2.25% | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted LIBO Rate plus the applicable margin |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowing capacity under new revolving credit loans | 136,180 |  |  |  |  |  | 100,000 |  | 140,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings under term facility of new credit agreement | 3,820 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40,000 |  |  |  |  |  |
Debt instrument, interest rate |  |  | 5.90% |  |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |
Mortgage note, maturity date |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Apr. 26, 2017 |  |  |  |  |  |  |  |  |
Senior secured notes issued |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,000 |  |  |  |  |  |  |
Commitment fee percentage |  |  |  |  |  |  |  |  |  |  |  |  | 0.35% | 0.45% |  |  |  |  |  |  |  |  |  |
Percentage of fronting fee |  |  |  |  |  | 0.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted LIBO rate plus the applicable margin |  |  |  |  |  |  |  | 2.75% |  | 3.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior secured note maturity year |  |  | 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of installments |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Installment amount |  |  | $ 50,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Installment payment date |  |  |  | 2018-04-17 | 2023-04-17 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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