Unaudited Quarterly Results of Operations - Summarized Quarterly Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended																11 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 15, 2016	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 17,830	$ 117,253		$ 134,721		$ 144,405		$ 125,316		$ 116,280		$ 110,653		$ 107,780		$ 101,452			$ 521,695	$ 436,165
Direct operating expenses	16,603	92,335		106,103		109,747		98,211		94,351		87,115		63,560		87,306			406,396	332,332
Net loss	$ (10,244)	$ (23,078)		$ (23,860)		$ (16,895)		$ (24,963)		$ (22,327)		$ (38,220)		$ (13,183)		$ (46,859)			$ (88,796)	$ (120,589)
Earnings (loss) per share:
Basic and Diluted (usd per share)	$ (0.51)	$ (1.14)	[1]	$ (1.18)	[1]	$ (0.84)	[1]	$ (1.23)	[1]	$ (1.11)	[1]	$ (1.90)	[1]	$ (0.66)	[1]	$ (2.33)	[1]		$ (4.38)	$ (6.00)
Predecessor [Member]
Revenues																		$ 399,423
Direct operating expenses																		362,825
Net loss																		$ (131,736)
Earnings (loss) per share:
Basic and Diluted (usd per share)																		$ (0.82)

[1] Quarterly earnings per common share are based on the weighted average number of shares outstanding during the quarter, and the sum of the quarters may not equal annual earnings per common share.