FAIR VALUE MEASUREMENTS - Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets
Total assets	$ 297,553	$ 442,281
Level 1
Assets
Total assets	296,805	440,061
Level 2
Assets
Total assets	748	2,220
Level 3
Assets
Total assets	0	0
Market
Assets
Cash and cash equivalents	118,854	188,078
Restricted cash	177,951	251,983
Market | Level 1
Assets
Cash and cash equivalents	118,854	188,078
Restricted cash	177,951	251,983
Market | Level 2
Assets
Cash and cash equivalents	0	0
Restricted cash	0	0
Market | Level 3
Assets
Cash and cash equivalents	0	0
Restricted cash	0	0
Income
Assets
Derivative assets	748	2,220
Income | Level 1
Assets
Derivative assets	0	0
Income | Level 2
Assets
Derivative assets	748	2,220
Income | Level 3
Assets
Derivative assets	$ 0	$ 0