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

No definition available.

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- Definition

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

+ References

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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.

+ References

No definition available.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

+ References

No definition available.

+ Details

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- Definition

Period between issuance and maturity of long-term debt, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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- Definition

Weighted average interest rate of short-term debt outstanding calculated at point in time.

+ References

+ Details

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- Definition

Stated interest rate of the subordinated debt.

+ References

No definition available.

+ Details

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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Balance Type:	credit
Period Type:	instant

- Definition

Subordinated Debt, Secured Overnight Financing Rate, Term

+ References

No definition available.

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Borrowed Funds - Additional Information (Detail) - USD ($) $ in Thousands		6 Months Ended
	Jun. 05, 2020	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Weighted average interest rate for short-term borrowings		0.37%		1.68%
Advances of long-term borrowings		$ 838,388	$ 400,000
Subordinated borrowing interest rate	5.25%
Net subordinated note carrying value		$ 113,100
Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Weighted average interest rate for long-term borrowings		2.13%		2.23%
Federal Home Loan Bank Advances \| Minimum
Debt Instrument [Line Items]
Term of debt		3 years
Long-Term Borrowings
Debt Instrument [Line Items]
Weighted average interest rate for long-term borrowings		2.88%		1.94%
Subordinated Debt
Debt Instrument [Line Items]
Subordinated debt, net	$ 115,000
Subordinated debt initial term	5 years
Subordinated debt SOFR term	3 months
Federal Home Loan Bank Advances
Debt Instrument [Line Items]
Amount of hedged debt		$ 500,000
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Subordinated Debt
Debt Instrument [Line Items]
Subordinated debt basis points	514.00%
Subordinated Notes Due July 2025
Debt Instrument [Line Items]
Subordinated borrowing interest rate		4.55%
Subordinated Notes Due July 2025 \| Subordinated Debt
Debt Instrument [Line Items]
Subordinated debt, net		$ 100,000
Subordinated Notes Due September 2023
Debt Instrument [Line Items]
Subordinated borrowing interest rate		5.125%
Subordinated Notes Due September 2023 \| Subordinated Debt
Debt Instrument [Line Items]
Subordinated debt, net		$ 125,000
Subordinated Notes Due June 2026
Debt Instrument [Line Items]
Subordinated borrowing interest rate		6.25%
Subordinated Notes Due June 2026 \| Subordinated Debt
Debt Instrument [Line Items]
Subordinated debt, net		$ 60,000