Reporting Segments Schedule of restructuring and other related cots recognized during the year (Details) (USD $)	3 Months Ended				12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Restructuring and other related costs	$ 8,100,000	$ 0	$ 0	$ 0	$ 0	$ 8,100,000	$ 0
Goodwill Impairment					0	0	8,312,000
GETS [Member]
Segment Reporting Information [Line Items]
Restructuring and other related costs						4,467,000
PSS [Member]
Segment Reporting Information [Line Items]
Restructuring and other related costs						2,622,000
Goodwill Impairment							8,300,000
MRI [Member]
Segment Reporting Information [Line Items]
Restructuring and other related costs						372,000
Corporate [Member]
Segment Reporting Information [Line Items]
Restructuring and other related costs						639,000
Operating and Administrative Expenses [Member]
Segment Reporting Information [Line Items]
Benefit related to settlement			$ 9,700,000