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Term Loan - Additional Information (Detail) (USD $)
12 Months Ended 1 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Jul. 21, 2012
May 20, 2011
Term Loans
Dec. 29, 2012
Term Loans
Dec. 31, 2011
Term Loans
May 20, 2011
Term Loans
Base Rate Loans
Minimum
May 20, 2011
Term Loans
Base Rate Loans
Maximum
May 20, 2011
Term Loans
Eurodollar Loans
Minimum
May 20, 2011
Term Loans
Eurodollar Loans
Maximum
Debt Instrument [Line Items]                    
Basis spread on variable rate       0.50%     0.00% 1.375% 0.875% 2.375%
Term loan borrowed amount $ 150,000,000   $ 20,000,000 $ 150,000,000            
Term loan maturity date       Aug. 01, 2013            
Annual amortization of principal balance for first year       10.00%            
Annual amortization of principal balance for second year       10.00%            
Annual amortization of principal balance for third year       15.00%            
Annual amortization of principal balance for fourth year       20.00%            
Annual amortization of principal balance for fifth year       45.00%            
Additional financing costs 558,000 2,108,000   100,000            
Unamortized financing costs       800,000            
Amounts outstanding under term loan $ 67,500,000 $ 90,000,000     $ 67,500,000 $ 90,000,000