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Borrowings - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
Short-term Debt [Line Items]
Federal Home Loan Bank advances are secured by first and second mortgage loans and mortgage warehouse loans	$ 830.8
Available credit lines with various money center banks	$ 672.7
Maximum
Short-term Debt [Line Items]
Call date	Oct. 24, 2022
Minimum
Short-term Debt [Line Items]
Call date	Jan. 24, 2022
Federal Home Loan Bank, Advances, Putable Option
Short-term Debt [Line Items]
Putable advances	$ 425.0

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Federal Home Loan Bank Borrowings Call Date.

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Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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Amount of maximum advances or credit lines available from the Federal Home Loan Bank (FHLB).

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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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