Other Real Estate Owned Net - Components of Expenses Applicable to Foreclosed Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Real Estate Acquired Through Foreclosure Or Similar Procedures [Line Items]
Net loss on sales of real estate	$ 92	$ 263
Provision for losses	235us-gaap_ProvisionForOtherLosses	300us-gaap_ProvisionForOtherLosses
Operating expenses, net of income	131us-gaap_OtherOperatingIncomeExpenseNet	124us-gaap_OtherOperatingIncomeExpenseNet
Total expenses	$ 458	$ 687

Amount of expense related to other loss.

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

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