EQUITY-BASED COMPENSATION - Equity-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Compensation expense to be recognized
Unrecognized compensation costs related to non-vested awards	$ 10,432		$ 10,432
2020	3,038		3,038
2021	4,513		4,513
2022	2,433		2,433
2023	431		431
2024	17		17
Corporate general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	1,966	$ 1,964	3,441	$ 3,316
Director stock | Corporate general and administrative | Director stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	447	496	447	496
Time-based restricted stock | Restricted Stock Awards
Compensation expense to be recognized
Unrecognized compensation costs related to non-vested awards	4,399		4,399
2020	1,247		1,247
2021	1,859		1,859
2022	1,041		1,041
2023	235		235
2024	17		17
Time-based restricted stock | Restricted Stock Awards | Corporate general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	623	606	1,225	1,148
Performance-based restricted stock | Restricted Stock Awards
Compensation expense to be recognized
Unrecognized compensation costs related to non-vested awards	6,033		6,033
2020	1,791		1,791
2021	2,654		2,654
2022	1,392		1,392
2023	196		196
2024	0		0
Performance-based restricted stock | Restricted Stock Awards | Corporate general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	$ 896	$ 862	$ 1,769	$ 1,672