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Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Loans Held for Investment by Portfolio Segment (Parenthetical) (Detail) - USD ($) | Jun. 30, 2022 | Dec. 31, 2021
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Receivables [Abstract] |  |
Accrued interest receivable | $ 23,300,000 | $ 21,000,000.0
Pay check protection program loan held for investment | 3,200,000 | 80,400,000
Paycheck protection program unamortized processing fees | $ 0 | $ 2,000,000.0

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- Definition Pay check protection program loan held for investment. + References No definition available. + Details
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Balance Type: | debit
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- Definition Paycheck protection program unamortized processing fees. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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