Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Goodwill, Balance beginning of period	$ 96,251
Accumulated Impairment Loss	(63,547)	$ (45,621)
Goodwill, Impairment	(21,034)
Translation and purchase accounting djustments	(186)
Goodwill, Balance end of period	92,957
GETS [Member]
Goodwill [Roll Forward]
Goodwill, Balance beginning of period	35,713
Accumulated Impairment Loss	(21,431)	(11,051)
Goodwill, Impairment	(10,380)
Translation and purchase accounting djustments	0
Goodwill, Balance end of period	35,713
PSS [Member]
Goodwill [Roll Forward]
Goodwill, Balance beginning of period	44,298
Accumulated Impairment Loss	(35,643)	(27,904)
Goodwill, Impairment	(10,654)
Translation and purchase accounting djustments	(117)
Goodwill, Balance end of period	41,266
MRI [Member]
Goodwill [Roll Forward]
Goodwill, Balance beginning of period	16,240
Accumulated Impairment Loss	(6,473)	$ (6,666)
Goodwill, Impairment	0
Translation and purchase accounting djustments	(69)
Goodwill, Balance end of period	$ 15,978