Intangible Assets - Amortized Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 73,675	$ 73,675
Accumulated Amortization	61,787	58,120
Intangible Assets, Net (Including Goodwill)	11,888
Net Carrying Value	11,888	15,555
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	24,217	24,217
Accumulated Amortization	15,234	12,397
Net Carrying Value	8,983	11,820
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	10,578	10,578
Accumulated Amortization	7,891	7,160
Net Carrying Value	2,687	3,418
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	710
Accumulated Amortization	492
Net Carrying Value	218
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	110	110
Accumulated Amortization	110	67
Net Carrying Value	$ 0	43
Non-compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value		710
Accumulated Amortization		436
Net Carrying Value		$ 274