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Acquisition of IA Bancorp, Inc. (Summary of Credit Adjustment on Acquired Impaired Loans) (Details) $ in Thousands | Jun. 30, 2018 USD ($)
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Acquisition of IA Bancorp, Inc. [Abstract] |
Contractually required principal and interest at acquisition | $ 21,177
Contractual cash flows not expected to be collected (non-accretable discount, includes principal and interest) | (4,892)
Expected cash flows at acquisition | 16,285
Interest component of expected cash flows (accretable discount) | 1,399
Fair value of loans acquired accounted for under ASC 310-30 | $ 14,886

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