Goodwill and Other Intangible Assets - Components of Other Intangible Assets and Changes in Gross Carrying Values (Detail) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Other Finite-Lived Intangible Assets, Gross Carrying Value		$ 34,297	$ 27,305
Other Finite-Lived Intangible Assets, Accumulated Amortization		11,958	9,348
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Other Finite-Lived Intangible Assets, Gross Carrying Value		6,947	6,947
Other Finite-Lived Intangible Assets, Accumulated Amortization		3,294	2,696
Non-compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Other Finite-Lived Intangible Assets, Gross Carrying Value	[1]	461
Other Finite-Lived Intangible Assets, Accumulated Amortization	[1]	15
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Other Finite-Lived Intangible Assets, Gross Carrying Value		4,087	4,087
Other Finite-Lived Intangible Assets, Accumulated Amortization		1,525	1,150
Customer Lists And Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Other Finite-Lived Intangible Assets, Gross Carrying Value	[1]	12,238	8,026
Other Finite-Lived Intangible Assets, Accumulated Amortization	[1]	3,337	2,621
Know-how [Member]
Finite-Lived Intangible Assets [Line Items]
Other Finite-Lived Intangible Assets, Gross Carrying Value	[2]	8,043	8,245
Other Finite-Lived Intangible Assets, Accumulated Amortization	[2]	3,682	$ 2,881
Supply Contract [Member]
Finite-Lived Intangible Assets [Line Items]
Other Finite-Lived Intangible Assets, Gross Carrying Value	[1]	2,521
Other Finite-Lived Intangible Assets, Accumulated Amortization	[1]	$ 105

[1] See Note 20 for information regarding the intangibles acquired in a business combination.

[2] Know-how includes intellectual property rights covering proprietary information, written formulae, trade secrets or secret processes, inventions and developmental products (whether patentable or not), discoveries, improvements, compositions, manufacturing processes, manuals, specifications and technical data.