Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net loss	$ (96,674)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities
Depreciation and amortization	112,209
Goodwill impairment	0
Bargain purchase gain	0
Accretion on asset retirement obligation	160
Change in allowance for doubtful accounts	1,523
Amortization of deferred financing costs	194
Amortization of debt discounts (premiums)	7,264
Non-cash compensation	22,954
Loss on disposal of assets	274
Deferred income taxes	78
Reorganization items, non-cash	0
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(41,303)
Inventories	(712)
Prepaid expenses and other current assets	(7,065)
Other assets	(1,244)
Accounts payable	25,548
Income tax receivable	(607)
Other liabilities	2,704
Accrued expenses	644
Net cash provided by (used in) operating activities	25,947
Cash flows from investing activities:
Purchase of property and equipment	(63,361)
Proceeds from sale of assets	9,814
Payments for businesses, net of cash acquired	0
Net cash used in investing activities	(53,547)
Cash flows from financing activities:
Proceeds from debt	64,000
Proceeds from Debtor-in-Possession financing	0
Payments of debt	(46,589)
Change in restricted cash	(45,274)
Proceeds from rights offering	0
Change in treasury stock	(2,035)
Tax withholding from exercise of stock options	0
Exercise of employee stock options	0
Deferred loan costs and other financing activities	(2,857)
Net cash (used in) provided by financing activities	(32,755)
Net (decrease) increase in cash and equivalents	(60,355)
Cash and cash equivalents - beginning of year	98,875
Cash and cash equivalents - end of year (2017 and 2016: Successor; and 2015: Predecessor)	38,520	$ 98,875
Predecessor
Cash flows from operating activities:
Net loss		(123,373)	$ (241,745)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities
Depreciation and amortization		218,205	241,471
Goodwill impairment		646	81,877
Bargain purchase gain		(662)	0
Accretion on asset retirement obligation		147	134
Change in allowance for doubtful accounts		(812)	638
Amortization of deferred financing costs		7,952	3,622
Amortization of debt discounts (premiums)		(257)	(261)
Non-cash compensation		27,723	13,728
Loss on disposal of assets		1,014	1,602
Deferred income taxes		(4,403)	(131,171)
Reorganization items, non-cash		(332,854)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable		(5,712)	144,430
Inventories		2,112	7,846
Prepaid expenses and other current assets		(239)	(740)
Other assets		(1,094)	(767)
Accounts payable		(6,563)	3,903
Income tax receivable		557	1,293
Other liabilities		(4,449)	1,109
Accrued expenses		70,573	(31,430)
Net cash provided by (used in) operating activities		(151,489)	95,539
Cash flows from investing activities:
Purchase of property and equipment		(32,689)	(53,868)
Proceeds from sale of assets		3,284	8,109
Payments for businesses, net of cash acquired		0	(16,730)
Net cash used in investing activities		(29,405)	(62,489)
Cash flows from financing activities:
Proceeds from debt		165,000	8,816
Proceeds from Debtor-in-Possession financing		38,390	0
Payments of debt		(84,881)	(68,635)
Change in restricted cash		(2,429)	0
Proceeds from rights offering		125,000	0
Change in treasury stock		2,837	(5,742)
Tax withholding from exercise of stock options		0	(3)
Exercise of employee stock options		0	727
Deferred loan costs and other financing activities		(10,880)	(1,396)
Net cash (used in) provided by financing activities		233,037	(66,233)
Net (decrease) increase in cash and equivalents		52,143	(33,183)
Cash and cash equivalents - beginning of year	$ 98,875	46,732	79,915
Cash and cash equivalents - end of year (2017 and 2016: Successor; and 2015: Predecessor)		$ 98,875	$ 46,732