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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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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).

+ References

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

+ 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

The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period.

+ References

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- Definition

Amount of realized gain (loss) on investment.

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-Publisher FASB
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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)	3 Months Ended
Investment Securities - Additional Information (Detail)	Mar. 31, 2023 USD ($) investmentSecurity securityLoan	Dec. 31, 2022 USD ($)	Mar. 31, 2022
Investment Securities [Line Items]
Proceeds from the sale of investment securities	$ 24,200,000
Gross realized losses from the sale of investment securities	200,000
Securities pledged as collateral	648,400,000	$ 595,800,000
Residential real estate mortgage-backed securities	$ 1,502,500,000,000
Life of mortgage-backed securities	6 years 6 months 10 days
Allowance for credit losses	$ 0	0
Obligations of U.S. government agencies
Investment Securities [Line Items]
Impairment losses recognized	0
Allowance for credit losses	$ 0	0
Number of available for sale securities in unrealized loss position (in investment securities) \| investmentSecurity	261
Percentage of aggregate depreciation in unrealized losses	10.97%
Obligations of states and political subdivisions
Investment Securities [Line Items]
Impairment losses recognized	$ 0
Allowance for credit losses	$ 0	0
Number of available for sale securities in unrealized loss position (in investment securities) \| investmentSecurity	159
Percentage of aggregate depreciation in unrealized losses	11.07%
Corporate bonds
Investment Securities [Line Items]
Impairment losses recognized	$ 0
Allowance for credit losses	$ 0	0
Number of available for sale securities in unrealized loss position (in investment securities) \| investmentSecurity	6
Percentage of aggregate depreciation in unrealized losses	6.93%
Asset backed securities
Investment Securities [Line Items]
Impairment losses recognized	$ 0
Allowance for credit losses	$ 0	0
Number of available for sale securities in unrealized loss position (in investment securities) \| investmentSecurity	47
Percentage of aggregate depreciation in unrealized losses	2.97%
Non-agency collateralized mortgage obligations
Investment Securities [Line Items]
Impairment losses recognized	$ 0
Allowance for credit losses	$ 0	$ 0
Number of available for sale securities in unrealized loss position (in investment securities) \| securityLoan	22
Allowance for credit loss	$ 0
Percentage of aggregate depreciation in unrealized losses	11.04%		11.04%