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Fair Value Measurements - Foreclosed Assets Remeasured and Reported at Fair Value (Detail) - USD ($)
$ in Thousands
Sep. 30, 2015
Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreclosed Assets Remeasured at Initial Recognition Carrying Value Of Foreclosed Assets Prior To Remeasurement $ 975 $ 4,077
Foreclosed Assets Remeasured at Initial Recognition Charge-offs recognized in the allowance for loan losses (149) (285)
Fair Value of Foreclosed Assets Remeasured at Initial Recognition 826 3,792
Foreclosed Assets Remeasured Subsequent to initial Recognition Carrying value of foreclosed assets prior to remeasurement 205 5,002
Foreclosed Assets Remeasured Subsequent to Initial Write-downs included in other non-interest expense (36) (1,277)
Fair Value of Foreclosed Assets remeasured subsequent to initial recognition $ 169 $ 3,725