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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
	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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Debt instrument basis rate applicable margin.

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Debt instrument basis rate applicable maximum margin.

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Debt instrument basis rate percentage points added.

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Debt Instrument Installments Payment

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Line Of Credit Facility Fronting Fee Percentage

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Notes Maturity Year

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Number of Installments

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Quarterly Principal Payments On Term Loan

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount borrowed under the credit facility as of the balance sheet date.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of the required periodic payment applied to principal.

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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Stated maturity date of the mortgage loan receivable on real estate, in CCYY-MM-DD format.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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