Schedule II Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Allowance for doubtful accounts
Movement in Schedule II Valuation and Qualifying Accounts
Balance at Beginning of Period	$ 2,532	$ 2,587	$ 3,111
Additions Charged to Costs and Expenses	390	358	787
Write-Offs	(1,120)	(957)	(1,339)
Other Charges Add/Deduct	(254)	544	28
Balance at End of Period	1,548	2,532	2,587
Reserve for inventory obsolescence
Movement in Schedule II Valuation and Qualifying Accounts
Balance at Beginning of Period	25,487	28,895	29,655
Additions Charged to Costs and Expenses	5,499	3,953	5,792
Write-Offs	(4,983)	(5,742)	(5,850)
Other Charges Add/Deduct	1,441	(1,619)	(702)
Balance at End of Period	$ 27,444	$ 25,487	$ 28,895