Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

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

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

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The cash inflow from a borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in liquidation of the entity's assets or underlying collateral.

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Amount of maintained federal fund lines of credit with correspondent banks.

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Amount of Maintained Federal Funds Lines of Credit With Correspondent Banks, Remaining Borrowing Capacity

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Amount of maintained line of credit with correspondent bank for the parent company.

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- Definition

The term for the variable rate of the debt instrument.

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Investment securities used as collateral for Federal Reserve Bank line of credit.

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Outstanding amount of federal fund lines of credit with federal reserve bank.

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Outstanding amount of line of credit with correspondent bank for the parent company.

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Borrowings - Additional Information (Detail) - USD ($)			12 Months Ended			60 Months Ended
Borrowings - Additional Information (Detail) - USD ($)	Nov. 15, 2022	Aug. 05, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Nov. 14, 2032	Aug. 14, 2030
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 2,900,000,000
Outstanding short term letters of credit			690,500,000	$ 831,800,000
Available borrowing capacity from the Federal Home Loan Bank			1,900,000,000
Investment securities collateral for Federal Reserve Bank Discount Window Lending program			98,100,000	28,800,000
Outstanding amount of federal fund line of credit with Federal Reserve Bank of Philadelphia			0	0
Amount of maintained line of credit with correspondent bank - parent company			10,000,000
Outstanding amount of line of credit with correspondent bank - parent company			0	0
Total committed borrowing capacity			3,000,000,000	2,500,000,000
Total committed borrowing capacity available			2,100,000,000	1,600,000,000
Amount of maintained federal fund lines of credit with correspondent banks			410,000,000	400,000,000
Amount of maintained federal funds lines of credit with correspondent banks, remaining borrowing capacity			350,000,000	400,000,000
Proceeds from issuance of subordinated notes			$ 50,000,000	$ 0	$ 100,000,000
Subordinated Debt [Member] \| Fixed-to-Floating Rate, Subordinated Debt, Due in 2030 [Member]
Debt Instrument [Line Items]
Aggregate principal amount of debt		$ 100,000,000
Annual fixed rate of interest		5.00%
Proceeds from issuance of subordinated notes		$ 98,400,000
Subordinated Debt [Member] \| Fixed-to-Floating Rate, Subordinated Debt, Due in 2030 [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] \| Forecast [Member]
Debt Instrument [Line Items]
Basis spread of interest rate (LIBOR)							495.20%
Debt Instrument, Term of Variable Rate Basis							3 months
Subordinated Debt [Member] \| Fixed-to-Floating Rate, Subordinated Debt, Due in 2032
Debt Instrument [Line Items]
Aggregate principal amount of debt	$ 50,000,000
Annual fixed rate of interest	7.25%
Proceeds from issuance of subordinated notes	$ 49,000,000
Subordinated Debt [Member] \| Fixed-to-Floating Rate, Subordinated Debt, Due in 2032 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] \| Forecast [Member]
Debt Instrument [Line Items]
Basis spread of interest rate (LIBOR)						309.80%
Debt Instrument, Term of Variable Rate Basis						3 months