Foreign Currency Loss, Net - Additional Information (Detail) $ in Thousands	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Foreign Currency Transaction [Abstract]
Exchange rates using first base rate	1,156.8	1,118.1
Intercompany loan balances	$ 672,684	$ 666,597

Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant