Other Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Intangible Assets [Line Items]
Gross Carrying Amount	$ 36,682	$ 36,501
Accumulated Amortization	$ (7,460)	$ (6,695)
Weighted Average Useful Life (in years)	13 years	13 years
Technology - developed
Intangible Assets [Line Items]
Gross Carrying Amount	$ 12,949	$ 12,911
Accumulated Amortization	$ (1,685)	$ (1,468)
Weighted Average Useful Life (in years)	17 years	17 years
Patents
Intangible Assets [Line Items]
Gross Carrying Amount	$ 240	$ 240
Accumulated Amortization	$ (215)	$ (208)
Weighted Average Useful Life (in years)	8 years	8 years
Customer relationships
Intangible Assets [Line Items]
Gross Carrying Amount	$ 22,697	$ 22,555
Accumulated Amortization	$ (5,525)	$ (4,995)
Weighted Average Useful Life (in years)	11 years	11 years
Other intangibles
Intangible Assets [Line Items]
Gross Carrying Amount	$ 85	$ 84
Accumulated Amortization	$ (35)	$ (24)
Weighted Average Useful Life (in years)	2 years	2 years
Trademark
Intangible Assets [Line Items]
Gross Carrying Amount, indefinite lived intangible assets	$ 711
Trademark
Intangible Assets [Line Items]
Gross Carrying Amount, indefinite lived intangible assets		$ 711