Goodwill and Other Intangible Assets (Schedule of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	41,618	42,871
Non-compete agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	380	380
Accumulated Amortization	(364)	(361)
Net Carrying Amount	16	19
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	125	125
Accumulated Amortization	(125)	(125)
Net Carrying Amount	0	0
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	19,960	19,960
Accumulated Amortization	(1,945)	(1,402)
Net Carrying Amount	18,015	18,558
Supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	350	350
Accumulated Amortization	(108)	(73)
Net Carrying Amount	242	277
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	6,280	6,280
Accumulated Amortization	(664)	(447)
Net Carrying Amount	5,616	5,833
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	19,602	19,457
Accumulated Amortization	(1,873)	(1,273)
Net Carrying Amount	17,729	18,184
Weighted Average [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years	20 years	20 years
Weighted Average [Member] | Non-compete agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years	5 years	5 years
Weighted Average [Member] | Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years	10 years	10 years
Weighted Average [Member] | Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years	23 years	23 years
Weighted Average [Member] | Supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years	5 years	5 years
Weighted Average [Member] | Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years	17 years	17 years
Weighted Average [Member] | Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years	18 years	18 years