Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Significant Accounting Policies [Line Items]
Depreciation and amortization of deferred leasing costs	$ 44,163,000	$ 44,636,000	$ 45,487,000
Repairs and maintenance expense	15,500,000	15,200,000	13,500,000
Deferred leasing costs, net	23,728,000	22,388,000
Accumulated amortization deferred leasing cost	53,700,000	51,300,000
Amortization of other deferred charges	4,200,000	4,300,000	4,700,000
Accrued penalties and interest	0	0	$ 0
Real estate investments for federal income tax	$ 1,590,000,000	$ 1,610,000,000
Minimum
Significant Accounting Policies [Line Items]
Operating lease term of contract	1 year
Minimum | Building
Significant Accounting Policies [Line Items]
Buildings and improvements depreciable lives in years	35 years
Maximum
Significant Accounting Policies [Line Items]
Operating lease term of contract	15 years
Maximum | Building
Significant Accounting Policies [Line Items]
Buildings and improvements depreciable lives in years	50 years
Maximum | Building Improvements
Significant Accounting Policies [Line Items]
Buildings and improvements depreciable lives in years	20 years