Note to Schedule One - Additional Information (Detail) - USD ($)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Reserves and registered capital of PRC subsidiaries	$ 347,977,000	$ 343,719,000
Minimum percentage of restricted net assets of consolidated and unconsolidated subsidiaries to consolidated net assets to file condensed financial information	25.00%
Cash dividend was declared by subsidiaries	$ 0	0	$ 0
Cash dividend was paid by subsidiaries	$ 0	$ 0	$ 0

The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.23(c))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 24
-Subparagraph c
-Article 7

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Data Type:	xbrli:monetaryItemType
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