Emergence from Chapter 11 and Fresh Start Accounting - Fresh-Start Adjustments (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Fresh-Start Adjustment Disclosures [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Reorganization Adjustments
Current assets:
Cash and cash equivalents		$ 71,567
Restricted cash		(5,962)
Trade accounts receivable, net of allowance of $1,858		0
Accounts receivable - related parties		0
Income tax receivable		0
Inventories		0
Prepaid expenses		0
Other current assets		0
Total current assets		65,605
Property and equipment, net		0
Deferred debt costs, net of amortization		66
Other intangible assets, net of amortization		0
Other assets		0
Total assets		65,671
Current liabilities:
Accounts payable		27
Accrued expenses		(13,879)
Current portion of long-term debt		(36,740)
Other current liabilities		0
Total current liabilities		(50,592)
Long-term debt		162,525
Deferred tax liabilities		0
Other long-term liabilities		0
Total liabilities not subject to compromise		111,933
Liabilities subject to compromise		(979,437)
Total liabilities		(867,504)
Stockholders' equity:
Retained deficit		518,767
Total stockholders' equity		933,175
Total liabilities and stockholder's equity		65,671
Fresh Start Adjustments
Current assets:
Cash and cash equivalents		0
Restricted cash		0
Trade accounts receivable, net of allowance of $1,858		0
Accounts receivable - related parties		0
Income tax receivable		0
Inventories		0
Prepaid expenses		0
Other current assets		(6,503)
Total current assets		(6,503)
Property and equipment, net		(178,391)
Deferred debt costs, net of amortization		(1,315)
Other intangible assets, net of amortization		(53,769)
Other assets		0
Total assets		(239,978)
Current liabilities:
Accounts payable		0
Accrued expenses		152
Current portion of long-term debt		(1,657)
Other current liabilities		0
Total current liabilities		(1,505)
Long-term debt		(17,343)
Deferred tax liabilities		(663)
Other long-term liabilities		0
Total liabilities not subject to compromise		(19,511)
Liabilities subject to compromise		0
Total liabilities		(19,511)
Stockholders' equity:
Retained deficit		159,718
Total stockholders' equity		(220,467)
Total liabilities and stockholder's equity		(239,978)
Predecessor
Current assets:
Cash and cash equivalents		27,308
Restricted cash		8,391
Trade accounts receivable		108,655
Accounts receivable - related parties		31
Income tax receivable		1,271
Inventories		35,691
Prepaid expenses		15,575
Other current assets		8,506
Total current assets		205,428
Property and equipment, net		667,239
Deferred debt costs, net of amortization		1,249
Other intangible assets, net of amortization		57,227
Other assets		11,324
Total assets		942,467
Current liabilities:
Accounts payable		47,932
Accrued expenses		65,056
Current portion of long-term debt		76,865
Other current liabilities		2,065
Total current liabilities		191,918
Long-term debt		39,570
Deferred tax liabilities		663
Other long-term liabilities		29,179
Total liabilities not subject to compromise		261,330
Liabilities subject to compromise		979,437
Total liabilities		1,240,767
Stockholders' equity:
Common stock		435
Paid-in capital		387,269
Treasury stock		(7,519)
Retained deficit		(678,485)
Total stockholders' equity		(298,300)
Total liabilities and stockholder's equity		$ 942,467
Other Fresh-Start Adjustment Disclosures [Abstract]
Common stock, par value (in dollars per share)		$ 0.01
Predecessor | Reorganization Adjustments
Stockholders' equity:
Common stock		$ (435)
Paid-in capital		0
Treasury stock		7,519
Predecessor | Fresh Start Adjustments
Stockholders' equity:
Common stock		0
Paid-in capital		(387,269)
Treasury stock		0
Successor
Current assets:
Cash and cash equivalents		98,875
Restricted cash		2,429
Trade accounts receivable		108,655
Accounts receivable - related parties		31
Income tax receivable		1,271
Inventories		35,691
Prepaid expenses		15,575
Other current assets		2,003
Total current assets		264,530
Property and equipment, net		488,848
Deferred debt costs, net of amortization		0
Other intangible assets, net of amortization		3,458
Other assets		11,324
Total assets		768,160
Current liabilities:
Accounts payable		47,959
Accrued expenses		51,329
Current portion of long-term debt		38,468
Other current liabilities		2,065
Total current liabilities		139,821
Long-term debt		184,752
Deferred tax liabilities		0
Other long-term liabilities		29,179
Total liabilities not subject to compromise		353,752
Commitments and contingencies		0
Total liabilities		353,752
Stockholders' equity:
Preferred stock		0
Common stock		261
Paid-in capital		417,624
Retained deficit		0
Successor treasury stock		(3,477)
Total stockholders' equity		414,408
Total liabilities and stockholder's equity		$ 768,160
Other Fresh-Start Adjustment Disclosures [Abstract]
Common stock, par value (in dollars per share)		$ 0.01
Preferred stock, par value (in dollars per share)		$ 0.01
Successor | Reorganization Adjustments
Stockholders' equity:
Common stock		$ 261
Paid-in capital		410,540
Treasury stock		(3,477)
Preferred stock		0
Successor | Fresh Start Adjustments
Stockholders' equity:
Common stock		0
Paid-in capital		7,084
Treasury stock		0
Preferred stock		$ 0