Restricted Unit Awards - Additional Information (Details) - Restricted Unit Awards [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense related to nonvested RUAs granted	$ 1,900,000		$ 1,900,000
Remaining compensation expense expected to be recognized over a weighted-average period			1 year 1 month 6 days
Intrinsic value of unvested RUAs			$ 3,000,000
General and Administrative Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense	$ 559,000	$ 587,000	$ 891,000	$ 937,000
2015 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSU available for future issuance	292,000		292,000
2015 Equity Incentive Plan [Member] | Greystone Manager [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Approved grant of restricted units and other awards to employees	1,000,000		1,000,000
RUAs granted with vesting range			3 years
2015 Equity Incentive Plan [Member] | Greystone Manager [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RUAs granted with vesting range			3 months