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Goodwill - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in carrying amount of goodwill	$ 0

X

- References

No definition available.

+ Details

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X

- Definition

Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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