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Long-Term Debt (Details Textual) (USD $)
 9 Months Ended
Sep. 30, 2012
Jan. 01, 2012
Long-Term Debt (Textual) [Abstract]    
Revolving credit facility $ 140,000,000  
First tier of increase to the borrowing capacity 165,000,000  
Maximum limit of credit facility 200,000,000  
Sublimit for issuances of letters of credit 50,000,000  
Sublimit for swingline loans 20,000,000  
Fixed charge coverage ratio 1  
Debt Instrument, Covenant Description Obligations under the Credit Facility are secured by a general lien and perfected security interest in substantially all of the Company’s assets. The Credit Agreement contains covenants that require the Company to maintain a fixed charge coverage ratio of not less than 1.0:1.0 in certain circumstances, and limit the Company’s ability to, among other things, incur liens, incur additional indebtedness, transfer or dispose of assets, change the nature of the business, guarantee obligations, pay dividends or make other distributions or repurchase stock, and make advances, loans or investments.  
Interest Rate, Description the highest of (a) the Federal funds rate, as in effect from time to time, plus one-half of one percent (0.50%), (b) the LIBO rate, as adjusted to account for statutory reserves, plus one percent (1.00%), or (c) the rate of interest in effect for such day as publicly announced from time to time by Wells Fargo as its “prime rate.”  
Commitment fees assessed 0.375%  
Maturity date of Credit Agreement Oct. 31, 2016  
Long-term revolving credit borrowings 52,574,000 63,476,000
Remaining borrowing availability $ 83,300,000 $ 72,800,000