Investment Securities [Line Items]

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- Definition

Life of mortgage backed securities.

+ References

No definition available.

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- Definition

Percentage of aggregate depreciation in unrealized losses.

+ References

No definition available.

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- Definition

Securities Pledged as Collateral

+ References

No definition available.

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- Definition

Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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- Definition

Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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- Definition

Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity).

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- Definition

Amount of expense (reversal of expense) for expected credit loss on investment in debt security measured at amortized cost (held-to-maturity).

+ References

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- Definition

The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).

+ References

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- Definition

Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Amount of realized gain (loss) on investment.

+ References

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- Definition

Debt securities issued by a United States government agency such as Government National Mortgage Association (Ginnie Mae), Federal Home Loan Mortgage Corporation (Freddie Mac), and Federal National Mortgage Association (Fannie Mae), which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References

No definition available.

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Investment Securities - Additional Information (Detail)	12 Months Ended
Investment Securities - Additional Information (Detail)	Dec. 31, 2023 USD ($) investmentSecurity securityLoan	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Investment Securities [Line Items]
Credit loss	$ 0	$ 0	$ 0
Allowance for credit loss	0	0
Realized loss	300,000
Proceeds from sale of available for sale securities	71,024,000	0	$ 0
Securities pledged as collateral	702,200,000	$ 595,800,000
Residential real estate mortgage-backed securities	$ 1,400,000,000
Life of mortgage-backed securities	6 years 8 months 12 days
Obligations of U.S. government agencies
Investment Securities [Line Items]
Available for sale securities in unrealized loss position \| investmentSecurity	165
Percentage of aggregate depreciation in unrealized losses	(11.90%)
Obligations of states and political subdivisions
Investment Securities [Line Items]
Available for sale securities in unrealized loss position \| investmentSecurity	153
Percentage of aggregate depreciation in unrealized losses	(10.73%)
Corporate bonds
Investment Securities [Line Items]
Available for sale securities in unrealized loss position \| securityLoan	6
Percentage of aggregate depreciation in unrealized losses	(9.25%)
Impairment losses recognized	$ 0
Allowance for credit loss	$ 0
Asset backed securities
Investment Securities [Line Items]
Available for sale securities in unrealized loss position \| investmentSecurity	35
Percentage of aggregate depreciation in unrealized losses	(1.47%)
Non-agency collateralized mortgage obligations
Investment Securities [Line Items]
Available for sale securities in unrealized loss position \| securityLoan	24
Percentage of aggregate depreciation in unrealized losses	(9.69%)
Impairment losses recognized	$ 0
Allowance for credit loss	$ 0