Fair Value Measurement - Amount of Gains and Losses from Changes in Fair Value Included in Earnings (Detail) - Jun. 30, 2015 - USD ($) $ in Thousands	Total	Total
Fair Value Inputs Assets Quantitative Information [Line Items]
Change in fair value	$ (146)	$ 415
Construction Loans [Member]
Fair Value Inputs Assets Quantitative Information [Line Items]
Change in fair value	(146)	415
Total change in fair value	$ (146)	$ 415

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 30

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Name:	us-gaap_FairValueOptionChangesInFairValueGainLoss1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration