Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Jul. 02, 2013	Dec. 31, 2012
Goodwill [Line Items]
Goodwill	$ 61,991		$ 62,009
Indefinite-Lived Trademarks	2,165		2,165
Goodwill [Roll Forward]
Goodwill, Balance beginning of period	91,722
Accumulated Impairment Loss	(29,713)		(29,713)
Additions	0
Translation and purchase accounting djustments	(18)
Goodwill, Balance end of period	91,704
GETS [Member]
Goodwill [Roll Forward]
Goodwill, Balance beginning of period	50,720
Accumulated Impairment Loss	(15,171)		(15,171)
Additions	0
Translation and purchase accounting djustments	0
Goodwill, Balance end of period	50,720
PSS [Member]
Goodwill [Line Items]
Fair value in excess of carrying value (percent)		15.00%
Goodwill		10,500
Goodwill [Roll Forward]
Goodwill, Balance beginning of period	25,109
Accumulated Impairment Loss	(8,312)		(8,312)
Additions	0
Translation and purchase accounting djustments	(15)
Goodwill, Balance end of period	25,094
MRI [Member]
Goodwill [Roll Forward]
Goodwill, Balance beginning of period	15,893
Accumulated Impairment Loss	(6,230)		(6,230)
Additions	0
Translation and purchase accounting djustments	(3)
Goodwill, Balance end of period	$ 15,890