Debt Obligations (Details Textual) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 1 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 9 Months Ended
Sep. 28, 2012
Sep. 23, 2011
Apr. 25, 2012
Apr. 25, 2012
Previous Credit Facility [Member]
Apr. 25, 2012
Senior Secured Credit Facility [Member]
Sep. 28, 2012
Senior Secured Credit Facility [Member]
Sep. 28, 2012
Minimum [Member]
Apr. 25, 2012
Minimum [Member]
Senior Secured Credit Facility [Member]
Apr. 25, 2012
Maximum [Member]
Sep. 28, 2012
Maximum [Member]
Sep. 28, 2012
Revolving credit facility [Member]
Sep. 28, 2012
Revolving credit facility [Member]
Federal Funds Purchased [Member]
Sep. 28, 2012
Revolving credit facility [Member]
Maximum [Member]
Federal Funds Purchased [Member]
Sep. 28, 2012
Fiscal quarter ended 2012 and 2013 [Member]
Minimum [Member]
rt
Sep. 28, 2012
Fiscal quarter ended 2012 and 2013 [Member]
Maximum [Member]
rt
Sep. 28, 2012
Fiscal quarter ended 2014 and 2015 [Member]
Minimum [Member]
rt
Sep. 28, 2012
Fiscal quarter ended 2014 and 2015 [Member]
Maximum [Member]
rt
Sep. 28, 2012
Fiscal quarter there after [Member]
Minimum [Member]
rt
Sep. 28, 2012
Fiscal quarter there after [Member]
Maximum [Member]
rt
Sep. 28, 2012
Mortgage Note [Member]
Apr. 26, 2012
Mortgage Note [Member]
Line of Credit Facility [Line Items]                                          
Senior secured loan, aggregate amount         $ 100,000                                
Additional borrowings (229,958) (282,112)           10,000 40,000                        
Debt instrument maturity date           Apr. 25, 2017                              
Principal payments on term loans         1,000                                
Principal payments on the term loans for last 16 quarters         1,500                                
Federal funds effective rate for overnight borrowings plus                       0.50% 1.00%                
Adjusted LIBO Rate for one month plus, the percentage interest                     2.50%                    
Adjusted LIBO Rate for one month plus, the applicable margin in each case                     0.50%                    
Adjusted LIBO Rate plus the applicable margin, for Revolving Credit Loans                     3.00%                    
Debt instrument, leverage ratio                           3.50 1.00 3.25 1.00 3.00 1.00    
Minimum ratio of consolidated EBITDA minus unfinanced portion of capital expenditures to consolidated fixed charges             1.25%     1.00%                      
Borrowing capacity under new revolving credit loans             100,000     140,000                      
Borrowings under term facility of new credit agreement 1,820   40,000 773 40,000                                
Interest accrued under mortgage note                                         1.00%
Mortgage note, maturity date                                       Apr. 26, 2017  
Interest rate condition description The LIBO Rate is the rate for eurodollar deposits for a period equal to one, two, three, six or nine months (as selected by the Borrowers) appearing on Reuters Screen LIBOR01 Page (or any successor or substitute page of such service), at approximately 11:00 a.m. London time, two business days prior to the commencement of the applicable interest period.                                        
Deferred financing fee $ 237