Reporting Segments Schedule of restructuring and other related cots recognized during the year (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Restructuring and other related costs	$ 3,604	$ 3,573	$ 566	$ 0	$ 47	$ 0	$ (298)	$ 370	$ 4,217	$ 3,645	$ 5,716
Impairment of Intangible Assets, Finite-lived		3,800
Impairment	0	14,653	21,537	0	0	$ 0	$ 0	$ 0	21,537	14,653	0
Impairment									21,034	10,887
Gain (Loss) on Disposition of Business	$ 0		$ 0	$ 0	$ (310)				(310)	0	0
Pretax gain on sale of assets									800
Payments for (Proceeds from) Other Investing Activities									(1,236)	(75)	(142)
GETS [Member]
Segment Reporting Information [Line Items]
Restructuring and other related costs									2,185	2,244	2,412
Impairment		$ 10,900							10,380	10,887
PSS [Member]
Segment Reporting Information [Line Items]
Restructuring and other related costs									1,182	1,001	2,269
Impairment									10,654	0
MRI [Member]
Segment Reporting Information [Line Items]
Restructuring and other related costs									0	259	313
Corporate [Member]
Segment Reporting Information [Line Items]
Restructuring and other related costs									850	$ 141	722
GETS AIE [Member]
Segment Reporting Information [Line Items]
Impairment									$ 500
Operating and Administrative Expenses [Member]
Segment Reporting Information [Line Items]
Benefit related to settlement											3,300
Year-End Adjustment [Member]
Segment Reporting Information [Line Items]
Fair value of contingent consideration											$ 1,800