Goodwill and Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Intangibles not subject to amortization:
Gross Carrying Value	$ 70,351		$ 71,403	[1]
Accumulated Amortization	(33,480)		(29,534)	[1]
Net Carrying Value	36,871	[1]	41,869	[1]
Trademarks And Tradenames [Member]
Intangibles not subject to amortization:
Gross Carrying Value	6,084		6,084	[1]
Net Carrying Value	6,084		6,084	[1]
Trademarks [Member]
Schedule of the balance of intangible assets by segment and the activity occurring in the past two fiscal years
Gross Carrying Value	1,623		1,690	[1]
Accumulated Amortization	(1,533)		(1,283)	[1]
Net Carrying Value	90		407	[1]
Patents [Member]
Schedule of the balance of intangible assets by segment and the activity occurring in the past two fiscal years
Gross Carrying Value	6,890		6,824	[1]
Accumulated Amortization	(6,807)		(6,701)	[1]
Net Carrying Value	83		123	[1]
Customer related assets [Member]
Schedule of the balance of intangible assets by segment and the activity occurring in the past two fiscal years
Gross Carrying Value	47,069		47,453	[1]
Accumulated Amortization	(19,678)		(16,395)	[1]
Net Carrying Value	27,391		31,058	[1]
Non-compete agreements [Member]
Schedule of the balance of intangible assets by segment and the activity occurring in the past two fiscal years
Gross Carrying Value	2,153		2,153	[1]
Accumulated Amortization	(2,053)		(2,021)	[1]
Net Carrying Value	100		132	[1]
Developed technology [Member]
Schedule of the balance of intangible assets by segment and the activity occurring in the past two fiscal years
Gross Carrying Value	4,040		4,040	[1]
Accumulated Amortization	(1,998)		(1,592)	[1]
Net Carrying Value	2,042		2,448	[1]
Other [Member]
Schedule of the balance of intangible assets by segment and the activity occurring in the past two fiscal years
Gross Carrying Value	2,492		3,159	[1]
Accumulated Amortization	(1,411)		(1,542)	[1]
Net Carrying Value	1,081		1,617	[1]
Subtotal [Member]
Schedule of the balance of intangible assets by segment and the activity occurring in the past two fiscal years
Gross Carrying Value	64,267		65,319	[1]
Accumulated Amortization	(33,480)		(29,534)	[1]
Net Carrying Value	$ 30,787		$ 35,785	[1]

[1] Restated