Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Intangible Assets [Line Items]
Gross Carrying Value	$ 158,236	$ 157,384
Gross Carrying Value	158,936	158,084
Accumulated Amortization	(23,498)	(13,331)
Net Carrying Value	134,738	144,053
Net Carrying Value	$ 135,438	$ 144,753
Weighted Average Useful Life (in years)	16 years	16 years
Trademark
Intangible Assets [Line Items]
Gross Carrying Value	$ 700	$ 700
Net Carrying Value	700	700
Accumulated Amortization	0	0
Technology - developed
Intangible Assets [Line Items]
Gross Carrying Value	53,315	51,801
Accumulated Amortization	(5,942)	(3,201)
Net Carrying Value	$ 47,373	$ 48,600
Weighted Average Useful Life (in years)	19 years	19 years
Patents
Intangible Assets [Line Items]
Gross Carrying Value	$ 240	$ 240
Accumulated Amortization	(240)	(238)
Net Carrying Value	$ 0	$ 2
Weighted Average Useful Life (in years)	8 years	8 years
Customer relationships
Intangible Assets [Line Items]
Gross Carrying Value	$ 101,460	$ 102,120
Accumulated Amortization	(16,609)	(9,636)
Net Carrying Value	$ 84,851	$ 92,484
Weighted Average Useful Life (in years)	14 years	14 years
Trademark
Intangible Assets [Line Items]
Gross Carrying Value	$ 2,160	$ 2,160
Accumulated Amortization	(159)	(47)
Net Carrying Value	$ 2,001	$ 2,113
Weighted Average Useful Life (in years)	20 years	20 years
Other intangibles
Intangible Assets [Line Items]
Gross Carrying Value	$ 1,061	$ 1,063
Accumulated Amortization	(548)	(209)
Net Carrying Value	$ 513	$ 854
Weighted Average Useful Life (in years)	3 years	3 years