Notes Payable - Components of Notes Payable (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Notes payable	$ 413,775	$ 426,500
Unamortized debt issuance cost	(33)	(49)
Notes payable, net	413,742	426,451
Unsecured Revolving Lines of Credit [Member]
Debt Instrument [Line Items]
Notes payable	313,775	266,500
Series C senior notes [Member] \| 3.84% Series C senior notes due in 2022 [Member]
Debt Instrument [Line Items]
Notes payable		60,000
Series C senior notes [Member] \| 2.35% Series E senior notes due in 2026 [Member]
Debt Instrument [Line Items]
Notes payable	60,000
Series E senior notes [Member] \| 2.35% Series E senior notes due in 2026 [Member]
Debt Instrument [Line Items]
Notes payable	60,000	60,000
Series D senior notes [Member] \| 2.57% Series D senior notes due in 2028 [Member]
Debt Instrument [Line Items]
Notes payable	$ 40,000	$ 40,000

Notes payable amount after reclassification of prepaid debt financing cost.

No definition available.

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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

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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- Definition

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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