Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 214,026	$ 173,272
Accumulated Amortization	54,546	40,764
Total intangible Assets, Gross Carrying Amount	218,688	177,440
Net Carrying Amount	159,480	132,508
Indefinite-lived other intangible assets	4,662	4,168
Total intangible assets, Net Carrying Amount	164,142	136,676
Trademarks and patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,161	6,825
Accumulated Amortization	1,882	1,156
Net Carrying Amount	8,279	5,669
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	73,779	68,880
Accumulated Amortization	31,382	24,365
Net Carrying Amount	42,397	44,515
Covenant not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,729	1,419
Accumulated Amortization	1,020	932
Net Carrying Amount	709	487
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	128,357	96,148
Accumulated Amortization	20,262	14,311
Net Carrying Amount	$ 108,095	$ 81,837