Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		4 Months Ended	8 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Apr. 22, 2016	Dec. 31, 2016
Predecessor [Member]
Basic EPS:
Net Income (Loss)		$ (108,303)	$ 851,611
Income, share amounts		44,672
Earnings Per Share, Basic		$ (2.42)
Dilutive Securities:
Dilutive RSAs		0
Dilutive RSUs		0
Dilutive Stock Options		0
Diluted EPS:
Net Income (Loss) Available to Common Stockholders, Diluted		$ (108,303)
Weighted Average Number of Shares Outstanding, Diluted		44,672
Earnings Per Share, Diluted		$ (2.42)
Predecessor [Member] | Stock Options [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares		1,300
Predecessor [Member] | Restricted Stock [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares		300
Predecessor [Member] | Restricted Stock Units (RSUs) [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares		800
Successor [Member]
Basic EPS:
Net Income (Loss)	$ 17,710			$ (156,288)
Income, share amounts	11,232
Earnings Per Share, Basic	$ 1.58
Dilutive Securities:
Dilutive RSAs	0
Dilutive RSUs	76
Dilutive Stock Options	15
Diluted EPS:
Net Income (Loss) Available to Common Stockholders, Diluted	$ 17,710
Weighted Average Number of Shares Outstanding, Diluted	11,323
Earnings Per Share, Diluted	$ 1.57
Successor [Member] | Stock Options [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	400
Successor [Member] | Restricted Stock Units (RSUs) [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	100
Warrant [Member] | Successor [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	4,300