Goodwill and Definite-Lived Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 87,661	$ 158,740
Accumulated Amortization	(21,848)	(23,813)
Net Carrying Amount	65,813	134,927
Non-competition agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	4,252	6,984
Accumulated Amortization	(2,005)	(2,495)
Net Carrying Amount	2,247	4,489
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	380	378
Accumulated Amortization	(145)	(124)
Net Carrying Amount	235	254
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	37,295	94,338
Accumulated Amortization	(6,069)	(8,441)
Net Carrying Amount	31,226	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	10,054	14,252
Accumulated Amortization	(3,036)	(3,025)
Net Carrying Amount	7,018	11,227
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	35,680	42,438
Accumulated Amortization	(10,593)	(9,393)
Net Carrying Amount	$ 25,087	$ 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