Revenue from Contracts with Customers - Condensed Consolidated Statement of Balance Sheet (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Accounts receivable, net	$ 119,615	$ 108,446
Inventories	91,559	$ 82,617
Equity
Retained earnings	203,159
Balances Without Adoption of ASC 606 [Member] \| Accounting Standards Update 2014-09 [Member]
Assets
Accounts receivable, net	119,669
Inventories	91,514
Equity
Retained earnings	203,168
Effect of Change [Member] \| Accounting Standards Update 2014-09 [Member]
Assets
Accounts receivable, net	(54)
Inventories	45
Equity
Retained earnings	$ (9)

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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