Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 25, 2012	Dec. 27, 2011
Components of accrued liabilities
Payroll and vacation	$ 15,972	$ 18,383
Due to sellers	5,122
Accrued transaction costs		12,995
Accrued litigation expenses		8,000
Other	27,946	23,515
Total Accrued liabilities	$ 49,040	$ 62,893