Goodwill and Related Intangible Assets (Schedule of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	$ 129,964	$ 84,524
Total acquired intangible assets, Gross Carrying Amount	185,507	127,244
Accumulated Amortization, Finite-lived intangible assets	48,776	45,029
Total acquired intangible assets, Accumulated Amortization	48,776	45,029
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	6,520	3,886
Accumulated Amortization, Finite-lived intangible assets	2,128	1,827
Unpatented technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	28,077	24,527
Accumulated Amortization, Finite-lived intangible assets	9,676	8,768
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	85,792	52,974
Accumulated Amortization, Finite-lived intangible assets	33,156	31,554
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	3,107	1,807
Accumulated Amortization, Finite-lived intangible assets	1,617	1,550
Backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	6,468	1,330
Accumulated Amortization, Finite-lived intangible assets	2,199	1,330
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Indefinite-lived intangible assets	55,543	42,720
Accumulated Amortization, Indefinite-lived intangible assets	$ 0	$ 0
Minimum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated Life	2 years
Minimum | Unpatented technology
Finite-Lived Intangible Assets [Line Items]
Estimated Life	5 years
Minimum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Life	5 years
Minimum | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Estimated Life	4 years
Minimum | Backlog
Finite-Lived Intangible Assets [Line Items]
Estimated Life	6 months
Maximum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated Life	15 years
Maximum | Unpatented technology
Finite-Lived Intangible Assets [Line Items]
Estimated Life	20 years
Maximum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Life	17 years
Maximum | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Estimated Life	10 years
Maximum | Backlog
Finite-Lived Intangible Assets [Line Items]
Estimated Life	2 years