Receivables, Net (Details) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers, trade	$ 31,192	$ 28,372
Other receivables	1,061	1,268
Gross receivables	32,253	29,640
Less allowance for doubtful accounts	(263)	(467)
Net receivables	31,990	29,173
Notes Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable	$ 485	$ 483