Intangible Assets - Amortized Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 93,474	$ 60,724
Accumulated Amortization	53,984	50,611
Intangible Assets, Net (Including Goodwill)	39,490
Net Carrying Value	31,290	10,113
Distribution Networks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	38,060	38,060
Accumulated Amortization	38,060	38,060
Net Carrying Value	0	0
Completed Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	31,987	13,687
Accumulated Amortization	9,160	6,619
Net Carrying Value	22,827	7,068
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	14,407	8,607
Accumulated Amortization	6,402	5,716
Net Carrying Value	8,005	2,891
In Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	8,200
Accumulated Amortization	0
Net Carrying Value	8,200
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	710
Accumulated Amortization	350
Net Carrying Value	360
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	110
Accumulated Amortization	12
Net Carrying Value	$ 98
Non-compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value		370
Accumulated Amortization		216
Net Carrying Value		$ 154