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Business Combinations - Summary of Assets Received and Liabilities Assumed and Related Adjustments (Parenthetical) (Detail) $ in Thousands	Dec. 15, 2019 USD ($)
Explanation of adjustments
Estimated fair value of loans	$ 2,295
VCB's [Member]
Explanation of adjustments
Elimination of allowance for loan and lease losses	$ 1,419

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