Intangibles - Finite and Indefinite Lived Intangibles (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Historical Cost	$ 125,301	$ 148,454
Accumulated Amortization	87,231	85,870
Customer lists
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Historical Cost	78,693	92,637
Accumulated Amortization	71,343	65,158
License agreements
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Historical Cost	1,290	1,393
Accumulated Amortization	1,290	1,393
Developed technology
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Historical Cost	8,297	9,916
Accumulated Amortization	6,340	6,390
Patents
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Historical Cost	6,102	6,107
Accumulated Amortization	5,804	5,568
Other
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Historical Cost	2,548	7,407
Accumulated Amortization	2,454	7,361
Trademarks
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Historical Cost	$ 28,371	$ 30,994

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

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- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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