CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017
Successor
OPERATING ACTIVITIES
Net income (loss)	$ 129,865	$ (50,063)		$ 238,173
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and depletion	19,650	15,821		34,232
Deferred income tax expense	0	0		0
Stock based compensation expense	922	125		922
Non-cash reorganization items	0	0		0
Amortization of debt issuance costs and debt discount, net	427	376		889
Accretion of asset retirement obligations	904	735		1,899
Changes in operating assets and liabilities:
Trade accounts receivable	3,629	(28,041)		(26,655)
Other receivables	1,442	124		1,200
Inventories	(4,339)	14,677		(32,931)
Prepaid expenses and other current assets	(2,507)	(9,675)		(4,674)
Accounts payable	(2,459)	(7,349)		7,778
Accrued expenses and other current liabilities	17,072	28,593		10,017
Other	(3,202)	5,789		(3,893)
Net cash provided by (used in) operating activities	161,404	(28,888)		226,957
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(16,885)	(6,014)		(28,263)
Proceeds from sale of property, plant and equipment	0	34		0
Cash paid for acquisition, net of cash acquired	0	(24,107)		0
Proceeds from termination of life insurance policy	0	12,857		0
Purchases of short-term investments	0	(17,000)		0
Net cash used in investing activities	(16,885)	(34,230)		(28,263)
FINANCING ACTIVITIES
Dividends paid	(2,673)	0		(192,673)
Proceeds from Rights Offering	0	200,000		0
Proceeds from issuance of debt	0	0		0
Retirements of debt	(766)	(765)		(1,531)
Net cash transfers to Parent	0	0		0
Debt issuance costs paid	0	(4,515)		0
Net cash provided by (used in) financing activities	(3,439)	194,720		(194,204)
Net increase (decrease) in cash and cash equivalents and restricted cash	141,080	131,602		4,490
Cash and cash equivalents and restricted cash at beginning of period	16,066	0		152,656
Cash and cash equivalents and restricted cash at end of period	157,146	131,602	$ 0	$ 157,146
Predecessor
OPERATING ACTIVITIES
Net income (loss)			(61,816)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and depletion			28,958
Deferred income tax expense			18
Stock based compensation expense			390
Non-cash reorganization items	$ (18,882)		(18,882)
Amortization of debt issuance costs and debt discount, net			10,164
Accretion of asset retirement obligations			1,169
Changes in operating assets and liabilities:
Trade accounts receivable			15,097
Other receivables			1,070
Inventories			677
Prepaid expenses and other current assets			13,020
Accounts payable			(15,338)
Accrued expenses and other current liabilities			(16,083)
Other			858
Net cash provided by (used in) operating activities			(40,698)
INVESTING ACTIVITIES
Purchase of property, plant and equipment			(5,422)
Proceeds from sale of property, plant and equipment			0
Cash paid for acquisition, net of cash acquired			0
Proceeds from termination of life insurance policy			0
Purchases of short-term investments			0
Net cash used in investing activities			(5,422)
FINANCING ACTIVITIES
Dividends paid			0
Proceeds from Rights Offering			0
Proceeds from issuance of debt			15,723
Retirements of debt			(285)
Net cash transfers to Parent			(13,290)
Debt issuance costs paid			(8,388)
Net cash provided by (used in) financing activities			(6,240)
Net increase (decrease) in cash and cash equivalents and restricted cash			(52,360)
Cash and cash equivalents and restricted cash at beginning of period		$ 32,102	84,462
Cash and cash equivalents and restricted cash at end of period			$ 32,102