Derivatives and Hedging Instruments - Additional Information (Detail) - Forward Contracts [Member] - USD ($)	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015
Derivative [Line Items]
Net derivative (loss) included in OCI expected to be reclassified into earnings	$ (100,000)
Gains or losses were reclassified from OCI into earnings	0	$ 0
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative instrument, notional amount	$ 37,800,000

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of net gain (loss) recognized in earnings when a hedged firm commitment no longer qualifies as a fair value hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

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- Details

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