Advances of Federal Home Loan Bank (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Short-term Debt [Line Items]
Advances from Federal Home Loan Banks	$ 26,530	$ 26,719
Federal Home Loan one
Short-term Debt [Line Items]
Advances from Federal Home Loan Banks	26,530	0
Federal Home Loan two
Short-term Debt [Line Items]
Advances from Federal Home Loan Banks	$ 0	$ 26,719

Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

Name:	us-gaap_AdvancesFromFederalHomeLoanBanks
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant