Goodwill and Related Intangible Assets (Schedule of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	$ 113,646	$ 128,939
Total acquired intangible assets, Gross Carrying Amount	158,366	179,477
Accumulated Amortization, Finite-lived intangible assets	47,576	56,464
Total acquired intangible assets, Accumulated Amortization	47,576	56,464
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	5,808	5,861
Accumulated Amortization, Finite-lived intangible assets	2,427	1,884
Unpatented technology and patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	26,720	28,072
Accumulated Amortization, Finite-lived intangible assets	10,041	10,656
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	78,569	85,419
Accumulated Amortization, Finite-lived intangible assets	33,585	35,673
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	1,649	3,107
Accumulated Amortization, Finite-lived intangible assets	623	1,771
Backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	900	6,480
Accumulated Amortization, Finite-lived intangible assets	900	6,480
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Indefinite-lived intangible assets	44,720	50,538
Accumulated Amortization, Indefinite-lived intangible assets	$ 0	$ 0
Minimum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Minimum | Unpatented technology and patents
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Minimum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Minimum | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	4 years
Minimum | Backlog
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	6 months
Maximum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	15 years
Maximum | Unpatented technology and patents
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	20 years
Maximum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	17 years
Maximum | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	10 years
Maximum | Backlog
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	2 years