Loans Receivable, Credit Quality for Loans and the Allowance for Loan Losses - Summary of Changes in Accretable Discount Related to Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
|
| Receivables [Abstract] | ||||
| Balance - beginning of period | $ 326 | $ 332 | $ 310 | $ 378 |
| Accretion recognized during the period | (48) | (58) | (104) | (719) |
| Net reclassification from non-accretable to accretable | 38 | 48 | 110 | 663 |
| Balance - end of period | $ 316 | $ 322 | $ 316 | $ 322 |