Goodwill and Definite-Lived Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 90,560	$ 158,740
Accumulated Amortization	(20,140)	(23,813)
Net Carrying Amount	70,420	134,927
Non-competition agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	4,319	6,984
Accumulated Amortization	(1,782)	(2,495)
Net Carrying Amount	2,537	4,489
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	387	378
Accumulated Amortization	(142)	(124)
Net Carrying Amount	245	254
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	39,707	94,338
Accumulated Amortization	(5,518)	(8,441)
Net Carrying Amount	34,189	85,897
Supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value		350
Accumulated Amortization		(335)
Net Carrying Amount		15
Trademarks and trade names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	10,199	14,252
Accumulated Amortization	(2,831)	(3,025)
Net Carrying Amount	7,368	11,227
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	35,948	42,438
Accumulated Amortization	(9,867)	(9,393)
Net Carrying Amount	$ 26,081	$ 33,045
Weighted Average [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years	15 years
Weighted Average [Member] | Non-competition agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years	5 years	4 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	17 years	16 years
Weighted Average [Member] | Supplier relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years		5 years
Weighted Average [Member] | Trademarks and trade names [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years	14 years	13 years
Weighted Average [Member] | Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period In Years	14 years	13 years