The Maximum Incremental Commitment amount is the sum of all incremental commitments under the repurchase facility.

No definition available.

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- Definition

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

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No definition available.

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

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- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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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

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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Amount, after accumulated amortization, of debt discount (premium).

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- Definition

Date the credit facility terminates, in YYYY-MM-DD format.

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- Definition

Fair value of the amount outstanding under the credit facility.

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- Definition

Description of interest rate for borrowing under credit facility. Includes, but is not limited to, terms and method for determining interest rate.

+ References

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- Definition

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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- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date of the outstanding short-term borrowings under a revolving line of credit used by mortgage bankers to finance the origination or purchase of loans.

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Debt - Additional Information (Detail) - USD ($)	12 Months Ended
Debt - Additional Information (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Sep. 17, 2020	Sep. 09, 2020	May 04, 2020
Debt Instrument [Line Items]
Expiration date	Jul. 19, 2023
Senior Notes due 2022
Debt Instrument [Line Items]
Senior notes principal amount	$ 600,000,000
Senior notes interest rate	3.95%
Repurchase Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Senior notes interest rate	6.06%
Maximum loan borrowing capacity	$ 150,000,000
Debt outstanding	0	$ 0
Debt outstanding	$ 0	0
Repurchase Agreement \| Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	1.70%
Repurchase Agreement \| Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum
Debt Instrument [Line Items]
Debt instrument, marginal interest rate	1.70%
Senior Notes Due Two Thousand Thirty [Member]
Debt Instrument [Line Items]
Senior notes principal amount					$ 600,000,000
Senior notes maturity date	May 15, 2030
Senior notes effective interest rate	3.02%
Senior notes proceeds	$ 595,200,000
Senior notes interest rate	3.00%
Frequency of senior notes payment	semi-annually in arrears on May 15 and November 15
Debt issuance cost	$ 2,664,000	3,025,000
Debt Instrument, Unamortized Discount (Premium), Net	$ (871,000)	(975,000)
$250M Senior Notes Due Two Thousand Thirty [Member]
Debt Instrument [Line Items]
Senior notes principal amount				$ 250,000,000
$50M Senior Notes Due Two Thousand Thirty [Member]
Debt Instrument [Line Items]
Senior notes principal amount			$ 50,000,000
$300M Senior Notes Due Two Thousand Thirty [Member]
Debt Instrument [Line Items]
Senior notes effective interest rate	2.00%
Senior notes proceeds	$ 323,600,000
Debt issuance cost	1,095,000	1,243,000
Debt Instrument, Unamortized Discount (Premium), Net	19,518,000	$ 21,945,000
Amended Credit Agreement [Member] \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum loan borrowing capacity	300,000,000
Increase in commitment available	300,000,000
Amended Credit Agreement [Member] \| Revolving Credit Facility \| Sublimit for Issuance of Letters of Credit
Debt Instrument [Line Items]
Maximum loan borrowing capacity	$ 100,000,000
Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, interest rate description	Borrowings under the Amended Credit Agreement generally bear interest for Base Rate Loans at a Base Rate equal to the highest of (a) the Federal Funds Rate plus one-half of one percent, (b) Bank of America’s publicly announced “prime rate,” (c) one percent or (d) Term SOFR plus 100 basis points.
Expiration date	Feb. 12, 2026
Debt outstanding	$ 0
Debt outstanding	0
Credit Agreement \| Revolving Credit Facility \| Sublimit for Issuance of Letters of Credit
Debt Instrument [Line Items]
Letters of credit outstanding	$ 11,000,000