Long-term Debt and Bank Credit Facilities (Details) - Debt outstanding (USD $) In Thousands, unless otherwise specified	Jun. 15, 2013	Dec. 29, 2012
Asset-backed credit agreement:
Debt	$ 417,361	$ 356,251
Less current maturities	(1,311)
Long-term debt	416,050	356,251
Revolving Credit [Member]
Asset-backed credit agreement:
Debt	391,376	188,825
Senior Subordinated Convertible Debt [Member]
Asset-backed credit agreement:
Debt		148,724
Note Payable and Mortgage Notes [Member]
Asset-backed credit agreement:
Debt	18,702	18,702
Equipment Note [Member]
Asset-backed credit agreement:
Debt	$ 7,283