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Fair Value Measurement (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Aug. 26, 2010
Note Receivable Fair Value From Bakers [Member]
Dec. 31, 2012
Note Receivable From Bakers [Member]
Dec. 31, 2012
Note Receivable From Bakers [Member]
Dec. 31, 2011
Note Receivable From Bakers [Member]
Aug. 26, 2010
Note Receivable From Bakers [Member]
Dec. 31, 2012
Accounts Receivable [Member]
Dec. 31, 2011
Estimate of Fair Value, Fair Value Disclosure [Member]
Dec. 31, 2012
Estimate of Fair Value, Fair Value Disclosure [Member]
Note Receivable From Bakers [Member]
Unregistered Shares Of Common Stock Acquired       1,844,860       1,844,860      
Security Owned Not Readily Marketable, Fair Value                   $ 996 $ 996
Financing Receivable, Gross         4,148 4,148 4,092       4,148
Accounts Receivable, Net, Current                 852    
Other than Temporary Impairment Losses, Investments         996 996          
Tangible Asset Impairment Charges         4,148 4,148          
Provision for Doubtful Accounts 4,218 2,961 1,576           852    
Financing Receivable, Allowance for Credit Losses, Recovery $ 1,522