QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended								11 Months Ended	12 Months Ended
	Jan. 31, 2017	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Data [Abstract]
Revenues	$ 14,425	$ 83,243	$ 85,334	$ 82,675	$ 68,349	$ 75,058	$ 72,508	$ 70,379	$ 55,956	$ 201,039	$ 319,601	$ 273,901
Operating expenses	19,332	73,509	76,898	70,711	62,041	68,173	74,918	64,319	53,419	199,231	283,159	260,829
Operating income (loss)	(4,907)	9,734	8,436	11,964	6,308	6,885	(2,410)	6,060	2,537	1,808	36,442	13,072
Interest expense	614	2,006	2,145	2,288	2,071	8,338	3,434	3,392	3,284	11,448	8,510	18,448
Income (loss) before income taxes	(5,521)	7,728	6,291	9,676	4,237	(1,453)	(5,844)	2,668	(747)	(9,640)	27,932	(5,376)
Income tax (benefit) provision	(2,203)	2,387	2,253	2,602	1,081	(6,318)	7,569	824	(207)	534	8,323	1,868
Net income (loss)	$ (3,318)	$ 5,341	$ 4,038	$ 7,074	$ 3,156	$ 4,865	$ (13,413)	$ 1,844	$ (540)	$ (10,174)	$ 19,609	$ (7,244)
(Loss) earnings per share:
Basic and diluted (in dollars per share)		$ 0.14	$ 0.11	$ 0.19	$ 0.09	$ 0.13	$ (0.43)	$ 0.11	$ (0.03)	$ (0.59)	$ 0.52	$ (0.28)
Weighted-average common shares outstanding:
Basic (in shares)		38,014,444	37,984,316	37,505,598	36,182,783	36,182,783	30,975,338	17,227,682	17,227,682	17,227,682	37,428,345	25,484,386
Diluted (in shares)		38,274,079	38,286,702	37,594,151	36,195,463	36,572,071	30,975,338	17,227,682	17,227,682	17,227,682	37,594,158	25,484,386