Supplemental Selected Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	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, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 189,471	$ 202,763	$ 216,412	$ 211,473	$ 247,664	$ 235,329	$ 236,262	$ 227,293	$ 820,119	$ 946,548	$ 747,763
Operating income (loss)	(12,486)	6,288	10,914	5,679	20,523	10,054	19,143	13,838	10,395	63,558	31,436
Income (loss) from continuing operations	(17,093)	(1,441)	4,306	1,282	10,569	3,644	10,846	7,222	(12,946)	32,281	11,219
Net income (loss)	$ (17,093)	$ (1,441)	$ 4,306	$ 1,282	$ 10,569	$ 3,644	$ 10,846	$ 7,222	$ (12,946)	$ 32,281	$ (6,148)
Income (loss) per common share - basic:
Income from continuing operations (in dollars per share)	$ (0.19)	$ (0.02)	$ 0.05	$ 0.01	$ 0.12	$ 0.04	$ 0.12	$ 0.08	$ (0.14)	$ 0.36	$ 0.13
Net income (in dollars per share)	(0.19)	(0.02)	0.05	0.01	0.12	0.04	0.12	0.08	(0.14)	0.36	(0.07)
Income (loss) per common share - diluted:
Income from continuing operations (in dollars per share)	(0.19)	(0.02)	0.05	0.01	0.11	0.04	0.12	0.08	(0.14)	0.35	0.13
Net income (in dollars per share)	$ (0.19)	$ (0.02)	$ 0.05	$ 0.01	$ 0.11	$ 0.04	$ 0.12	$ 0.08	$ (0.14)	$ 0.35	$ (0.07)