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Debt instrument delayed draw feature amount

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Debt instrument maturity month and year.

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Debt instrument, maximum increasable amount.

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Gross fees paid for revolving credit facilities and term loans.

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Unsecured term loan gross borrowings.

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Dividend or interest rate associated with the financial instrument issued in exchange for the original debt being converted in a noncash or part noncash transaction. Noncash are transactions that affect recognized assets or liabilities but that do not result in cash receipts or cash payments. Part noncash refers to that portion of the transaction not resulting in cash receipts or cash payments.

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

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Amount of assets pledged to secure a debt instrument.

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States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure.

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Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

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Description of reference rate used for variable rate of debt instrument.

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

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

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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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Weighted average interest rate of debt outstanding.

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Fixed interest rate related to the interest rate derivative.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Identification of whether the entity has been in compliance with any credit facility debt covenants during the period.

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Unsecured and Secured Indebtedness - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Aug. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Covenant terms		The fixed-rate senior notes were issued pursuant to indentures that contain certain covenants, including limitations on incurrence of debt, maintenance of unencumbered real estate assets and debt service coverage. The covenants also provide that the cumulative dividends declared or paid from December 31, 1993, through the end of the current period cannot exceed Funds From Operations (as defined in the agreement) plus an additional $20.0 million for the same period unless required to maintain REIT status. Interest is paid semiannually in arrears. At December 31, 2022 and 2021, the Company was in compliance with all of the financial covenants under the indentures.
Covenant compliance		At December 31, 2022 and 2021, the Company was in compliance with all of the financial covenants under the indentures.
Revolving credit facilities		$ 0	$ 0
Gross fees paid for revolving credit facilities and term loans		2,200	$ 2,100	$ 2,600
Mortgage Payable [Member]
Debt Instrument [Line Items]
Net book value of investments and real estate collateralizing mortgages payable		$ 107,100
Mortgage Payable [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate		3.80%
Mortgage Payable [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate		4.90%
Term Loan [Member]
Debt Instrument [Line Items]
Outstanding borrowings		$ 200,000
Fixed interest rate		3.80%
Term Loan [Member] \| SOFR [Member]
Debt Instrument [Line Items]
Term loan	$ 200,000
Percentage of converted fixed interest rate	2.75%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facilities		$ 0
Revolving Credit Facility [Member] \| SOFR [Member]
Debt Instrument [Line Items]
Specified spread line of credit facility		10.00%
Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes, Weighted Average Interest Rate		4.10%	4.10%
Unsecured Debt [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Covenant compliance		The Company was in compliance with these financial covenants at December 31, 2022 and 2021.
Unsecured Debt [Member] \| Revolving Credit Facility [Member] \| SOFR [Member]
Debt Instrument [Line Items]
Specified spread line of credit facility		0.85%
Unsecured Debt [Member] \| Revolving Credit Facility [Member] \| Alternative Base Rate [Member]
Debt Instrument [Line Items]
Specified spread line of credit facility		0.00%
Unsecured Debt [Member] \| Wells Fargo Bank National Association [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument, maximum increasable amount		$ 800,000
Term loan maturity date		2027-06
Delayed draw feature amount		$ 100,000
Amount of term loan amended and restated		$ 100,000
Covenant compliance		Company was in compliance with these financial covenants at December 31, 2022 and 2021
Unsecured Debt [Member] \| Wells Fargo Bank National Association [Member] \| Term Loan [Member] \| SOFR [Member]
Debt Instrument [Line Items]
Specified spread line of credit facility		0.95%
Specified spread line of credit		10 basis point
Unsecured Debt [Member] \| Wells Fargo Bank National Association [Member] \| Term Loan [Member] \| Alternative Base Rate [Member]
Debt Instrument [Line Items]
Specified spread line of credit facility		0.00%