DEBT - Fair Value of Fixed-Rate Debt not Recorded at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Carrying Value
Debt
Debt	$ 442,858	$ 145,754
Carrying Value | Level 1 | Convertible notes
Debt
Debt	287,500	0
Carrying Value | Level 2 | Fixed-rate debt
Debt
Debt	155,358	145,754
Fair Value
Debt
Debt	456,149	143,244
Fair Value | Level 1 | Convertible notes
Debt
Debt	300,384	0
Fair Value | Level 2 | Fixed-rate debt
Debt
Debt	$ 155,765	$ 143,244