Accumulated Other Comprehensive Loss - Components of Changes in Accumulated Other Comprehensive Loss (Parenthetical) (Detail)	6 Months Ended
Jun. 30, 2016 USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]
Unrealized gain on derivative instruments, tax	$ 51,000
Unrealized loss on debt securities, tax	1,391,000
Deferred taxes recognized on related foreign currency translation adjustment	0
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Deferred taxes recognized on related foreign currency translation adjustment	0
Change in Fair Value of Derivatives [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Unrealized gain on derivative instruments, tax	51,000
Change in Fair Value of Debt Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Unrealized loss on debt securities, tax	$ 1,391,000

Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss), attributable to parent entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=64809438&loc=SL4573702-111684

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4569616-111683

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4569643-111683

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration