Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2012
Accumulated other comprehensive income (loss) [Roll Forward]
Balance at January 1, 2012	$ (6,344)
Unrealized gains (losses)	903
Unrealized gains in fair value	123
Unrecognized amounts from defined benefit pension plans	1,010
Tax effect	(348)
Net of tax amount	1,688
Balance at September 29, 2012	(4,656)
Foreign currencty translation adjustments [Member]
Accumulated other comprehensive income (loss) [Roll Forward]
Balance at January 1, 2012	2,950
Unrealized gains (losses)	903
Unrealized gains in fair value	0
Unrecognized amounts from defined benefit pension plans	0
Tax effect	0
Net of tax amount	903
Balance at September 29, 2012	3,853
Interest rate cash flow hedges [Member]
Accumulated other comprehensive income (loss) [Roll Forward]
Balance at January 1, 2012	(77)
Unrealized gains (losses)	0
Unrealized gains in fair value	123
Unrecognized amounts from defined benefit pension plans	0
Tax effect	(46)
Net of tax amount	77
Balance at September 29, 2012	0
Defined benefit pension plans [Member]
Accumulated other comprehensive income (loss) [Roll Forward]
Balance at January 1, 2012	(9,217)
Unrealized gains (losses)	0
Unrealized gains in fair value	0
Unrecognized amounts from defined benefit pension plans	1,010
Tax effect	(302)
Net of tax amount	708
Balance at September 29, 2012	$ (8,509)