Goodwill, Other Intangibles and Impairments of Long- Lived Assets (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Schedule of intangibles assets other than goodwill by major
Finite lived intangible asset Gross carrying Amount	$ 28,885	$ 19,708
Finite Lived intangible Assets Accumulated Amortization	(12,798)	(11,448)
Finite-Lived Intangible Assets, Net, Total	16,087	8,260
Total indefinite-lived intangible assets, Gross	4,763	4,812
Total indefinite-lived intangible assets	4,763	4,812
Total intangible assets, Gross Carrying Amount	33,648	24,520
Total intangible assets Accumulated Amortization	(12,798)	(11,448)
Total intangible assets, Net	20,850	13,072
Permits and licenses [Member]
Schedule of intangibles assets other than goodwill by major
Total indefinite-lived intangible assets, Gross	3,929	3,950
Total indefinite-lived intangible assets	3,929	3,950
Trademarks [Member]
Schedule of intangibles assets other than goodwill by major
Total indefinite-lived intangible assets, Gross	834	862
Total indefinite-lived intangible assets	834	862
Technology related [Member]
Schedule of intangibles assets other than goodwill by major
Finite lived intangible asset Gross carrying Amount	5,531	7,409
Finite Lived intangible Assets Accumulated Amortization	(2,607)	(4,057)
Total indefinite-lived intangible assets	2,924	3,352
Customer related [Member]
Schedule of intangibles assets other than goodwill by major
Finite lived intangible asset Gross carrying Amount	20,675	9,524
Finite Lived intangible Assets Accumulated Amortization	(7,854)	(5,586)
Total indefinite-lived intangible assets	12,821	3,938
Employment related [Member]
Schedule of intangibles assets other than goodwill by major
Finite lived intangible asset Gross carrying Amount	2,679	2,775
Finite Lived intangible Assets Accumulated Amortization	(2,337)	(1,805)
Total indefinite-lived intangible assets	$ 342	$ 970