LONG-TERM DEBT - Credit Facility (Details) $ in Thousands			6 Months Ended
	Oct. 16, 2020 USD ($) Lender	Nov. 26, 2019 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	May 19, 2021
Long-term debt
Margin added to variable rate basis (as a percent)			3.04%
Long-term debt			$ 300,973		$ 267,740
Proceeds from Long-Term Debt			162,500	$ 85,621
Credit Facility
Long-term debt
Maximum borrowing capacity	$ 150,000	$ 100,000
Credit facility term		4 years
Extension term		1 year
Additional borrowing capacity		$ 50,000
Current commitment under credit facility, amount			$ 150,000
Percentage of borrowing capacity			50.00%
Number Of Lenders | Lender	2
Maximum borrowing capacity including accordion feature	$ 200,000
Long-term debt			$ 72,500
Credit Facility | Minimum
Long-term debt
Ratio of unsecured indebtedness to base value						0.60
Ratio of unsecured indebtedness to total asset value						0.60
Credit Facility | LIBOR | Minimum
Long-term debt
Margin added to variable rate basis (as a percent)			1.35%
Marginal rate of fee on unused credit limit			0.15%
Credit Facility | LIBOR | Maximum
Long-term debt
Margin added to variable rate basis (as a percent)			1.95%
Marginal rate of fee on unused credit limit			0.25%