Significant Accounting Policies - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) business_segment shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Accounting Policies [Line Items]
Business segments | business_segment	4
Accrued straight-line rental adjustment	$ 5,927	$ 3,402	$ 2,731
Rental revenues	166,488	151,339	116,958
Leasing incentive amortization	700	700	700
Interest capitalized	3,600	5,900	5,000
Indirect project costs	2,600	3,100	3,100
Capitalized preacquisition development costs	15,382	6,472
Impairment charges			$ 1,500
Accounts receivable, net	28,259	23,470
Allowance for doubtful accounts	$ 1,700	$ 300
Percentage of taxable income for distributions to stockholders	90.00%
Dilutive shares outstanding (in shares) | shares	0	0	0
Accrued Straight-line Rental Revenue
Accounting Policies [Line Items]
Accounts receivable, net	$ 21,300	$ 17,900