Goodwill (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012	Dec. 31, 2011
Goodwill [Roll Forward]
Goodwill, Gross, Period Start	$ 91,240
Additions	0
Goodwill, Translation and Purchase Accounting Adjustments	(3)
Goodwill, Gross, End of Period	91,237
Accumulated Impairment Loss	(29,713)	(29,713)
MRI [Member]
Goodwill [Roll Forward]
Goodwill, Gross, Period Start	15,805
Additions	0
Goodwill, Translation and Purchase Accounting Adjustments	0
Goodwill, Gross, End of Period	15,805
Accumulated Impairment Loss	(6,230)	(6,230)
PSS [Member]
Goodwill [Roll Forward]
Goodwill, Gross, Period Start	24,715
Additions	0
Goodwill, Translation and Purchase Accounting Adjustments	(3)
Goodwill, Gross, End of Period	24,712
Accumulated Impairment Loss	(8,312)	(8,312)
GETS [Member]
Goodwill [Roll Forward]
Goodwill, Gross, Period Start	50,720
Additions	0
Goodwill, Translation and Purchase Accounting Adjustments	0
Goodwill, Gross, End of Period	50,720
Accumulated Impairment Loss	$ (15,171)	$ (15,171)

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details

The increase (decrease) in the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-Clause 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-Clause 7

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-Clause 6

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

+ Details