Mortgage Notes Payable - Summary of Company's Mortgage Notes Payable (Detail) - USD ($) $ in Thousands		12 Months Ended
	Dec. 20, 2017	Dec. 31, 2024	Dec. 31, 2023	Jul. 31, 2023	Mar. 24, 2020	Mar. 21, 2018
Debt Instrument [Line Items]
Mortgage notes payable		$ 486,822	$ 379,187
Unamortized loan costs		(11,650)	(9,764)
Mortgage notes payable, net		$ 475,172	369,423
4.18% People's United Bank, Loan [Member]
Debt Instrument [Line Items]
Mortgage notes payable			14,710
Interest Rate		4.18%
Maturity		Oct. 15, 2024
Allstate Life Insurance Company, Loan [Member]
Debt Instrument [Line Items]
Mortgage notes payable		$ 33,945	34,808
Interest Rate		4.00%
Maturity		Apr. 01, 2025
3.82 % United States Life Insurance Company, Loan [Member]
Debt Instrument [Line Items]
Mortgage notes payable	$ 39,000	$ 39,000	39,000
Interest Rate	3.82%	3.82%
Maturity	Jan. 01, 2028	Jan. 01, 2028
4.25 % United States Life Insurance Company, Loan [Member]
Debt Instrument [Line Items]
Mortgage notes payable		$ 32,059	32,632			$ 33,000
Interest Rate		4.25%
Maturity		Apr. 01, 2028
3.45% Transamerica Life Insurance Company, Loan [Member]
Debt Instrument [Line Items]
Mortgage notes payable		$ 7,809	8,037		$ 8,400
Interest Rate		3.45%
Maturity		Apr. 01, 2030
6.12% American General Life Insurance Company [Member]
Debt Instrument [Line Items]
Mortgage notes payable		$ 124,009
Interest Rate		6.12%
Maturity		Apr. 01, 2031
American International Group 2022, Loan [Member]
Debt Instrument [Line Items]
Mortgage notes payable		$ 225,000	225,000
Interest Rate		4.63%
Maturity		Sep. 01, 2032
Transamerica Life Insurance Company 2023, Loan [Member]
Debt Instrument [Line Items]
Mortgage notes payable		$ 25,000	$ 25,000	$ 25,000
Interest Rate		5.40%
Maturity		Aug. 01, 2033