BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of EPS (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended						9 Months Ended
		Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net Income (Loss)		$ (233,004)	$ (899,200)	$ 368,286	$ 94,381	$ 44,399	$ (107,162)	$ (763,918)	$ 31,619
Less: Cumulative Dividends on Preferred Stock		(3,718)			0			(10,986)	0
Net Income (Loss) Attributable to Common Shareholders		$ (236,722)			$ 94,381			$ (774,904)	$ 31,619
Weighted Average Common Shares Outstanding:
Weighted Average Shares Outstanding - Basic (in shares)	[1]	43,517,074			39,604,482			41,812,553	38,204,403
Plus: Dilutive Effect of Restricted Stock (in shares)		0			48,588			0	70,023
Plus: Dilutive Effect of Preferred Shares (in shares)		0			0			0	0
Weighted Average Common Shares Outstanding – Diluted (in shares)	[1]	43,517,074			39,653,070			41,812,553	38,274,426
Net Income (Loss) per Common Share:
Basic (in dollars per share)	[1]	$ (5.44)			$ 2.38			$ (18.53)	$ 0.83
Diluted (in dollars per share)	[1]	$ (5.44)			$ 2.38			$ (18.53)	$ 0.83
Restricted Stock
Net Income (Loss) per Common Share:
Shares underlying Restricted Stock Awards Excluded from EPS Due to Anti-Dilutive Effect (in shares)		84,319			8,821			54,885	4,033
Preferred Stock
Net Income (Loss) per Common Share:
Shares underlying Restricted Stock Awards Excluded from EPS Due to Anti-Dilutive Effect (in shares)		10,057,601			0			9,880,344	0

[1] Adjusted for the 1-for-10 reverse stock split.