Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended							10 Months Ended	12 Months Ended
	Oct. 20, 2016	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Oct. 20, 2016	Dec. 31, 2015	Dec. 31, 2014
Total revenues		$ 48,525
Operating income (loss)		10,673
Net income (loss)		9,930
Net income (loss) available to common shareholders		$ 9,650
Net income (loss) per share
Basic and diluted net income (loss) per share		$ 0.39
Shares used in computation
Basic and diluted weighted average number of common shares outstanding		25,009
Predecessor
Total revenues	$ 14,514		$ 64,193	$ 62,559	$ 51,961	$ 68,830	$ 110,363	$ 74,754	$ 111,198	$ 193,228	$ 365,145	$ 794,183
Operating income (loss)	(4,101)		(12,944)	(52,759)	(135,119)	(470,328)	(453,790)	(553,584)	(166,101)	(204,923)	(1,643,803)	260,833
Net income (loss)	1,531,775		(38,384)	8,962	(179,274)	(510,862)	(494,342)	(598,437)	(193,554)	1,323,079	(1,797,195)	116,929
Net income (loss) available to common shareholders	$ 1,515,351		$ (38,384)	$ 8,864	$ (179,274)	$ (510,862)	$ (494,490)	$ (599,106)	$ (193,685)	$ 1,306,557	$ (1,798,143)	$ 67,271
Net income (loss) per share
Basic and diluted net income (loss) per share	$ 142.19		$ (3.60)	$ 0.83	$ (16.88)	$ (48.48)	$ (72.34)	$ (88.44)	$ (28.80)	$ 122.74	$ (232.74)	$ 10.13
Shares used in computation
Basic and diluted weighted average number of common shares outstanding	10,657		10,657	10,653	10,621	10,537	6,835	6,774	6,726	10,645	7,726	6,644