Fresh Start Accounting - Schedule of Fresh Start Adjustments to Balance Sheet (Detail) $ in Thousands	Apr. 23, 2021 USD ($)
Current assets:
Fresh Start Adjustments, Other assets	$ (10,282)
Current assets:
Successor, Cash and cash equivalents	79,982
Successor, Restricted cash	35,447
Successor, Accounts receivable	134,906
Successor, Less: allowance for credit losses	(5,555)
Successor, Accounts receivable, net	129,351
Successor, Prepaid expenses and other current assets	58,655
Successor, Assets held for sale	1,000
Successor, Total current assets	304,435
Successor, Drilling and other property and equipment, net of accumulated depreciation	1,354,650
Successor, Other assets	57,047
Successor, Deferred tax asset	6,716
Successor, Total assets	1,722,848
Current liabilities:
Successor, Accounts payable	65,401
Successor, Accrued liabilities	123,055
Successor, Finance lease right of use liabilities, current	15,148
Successor, Taxes payable	22,034
Successor, Total current liabilities	225,638
Successor, Other liabilities	117,499
Successor, Finance lease right of use liabilities, noncurrent	158,919
Successor, Long-term debt	285,982
Successor, Total liabilities not subject to compromise	788,038
Stockholders’ equity:
Successor common stock	10
Successor additional paid-in capital	934,800
Successor, Total stockholders’ equity	934,810
Successor, Total liabilities and stockholders’ equity	1,722,848
Fresh Start Adjustments
Current assets:
Fresh Start Adjustments, Accounts receivable	802
Fresh Start Adjustments, Accounts receivable, net	802
Fresh Start Adjustments, Prepaid expenses and other current assets	(34,455)
Fresh Start Adjustments, Total current assets	(33,653)
Fresh Start Adjustments, Drilling and other property and equipment, net of accumulated depreciation	(2,720,485)
Fresh Start Adjustments, Other assets	(10,282)
Fresh Start Adjustments, Deferred tax asset	6,716
Fresh Start Adjustments, Total assets	(2,757,704)
Current liabilities:
Fresh Start Adjustments, Accrued liabilities	(55,961)
Fresh Start Adjustments, Total current liabilities	(55,961)
Fresh Start Adjustments, Deferred tax liability	(34,447)
Fresh Start Adjustments, Deferred tax liability, Reclassification	(7,518)
Fresh Start Adjustments, Other liabilities	(9,837)
Fresh Start Adjustments, Total liabilities not subject to compromise	(92,727)
Stockholders’ equity:
Fresh Start Adjustments, Accumulated deficit	(2,664,977)
Fresh Start Adjustments, Total stockholders’ equity	(2,664,977)
Fresh Start Adjustments, Total liabilities and stockholders’ equity	(2,757,704)
Previously Reported
Current assets:
Preconfirmation, Cash and cash equivalents	333,699
Preconfirmation, Restricted cash	3,274
Preconfirmation, Accounts receivable	134,104
Preconfirmation, Less: allowance for credit losses	(5,555)
Preconfirmation, Accounts receivable, net	128,549
Preconfirmation, Prepaid expenses and other current assets	108,594
Preconfirmation, Assets held for sale	1,000
Preconfirmation, Total current assets	575,116
Preconfirmation, Drilling and other property and equipment, net of accumulated depreciation	3,892,150
Preconfirmation, Other assets	179,783
Preconfirmation, Total assets	4,647,049
Current liabilities:
Preconfirmation, Accounts payable	66,397
Preconfirmation, Accrued liabilities	246,141
Preconfirmation, Short-term debt	442,034
Preconfirmation, Taxes payable	22,034
Preconfirmation, Total current liabilities	776,606
Preconfirmation, Deferred tax liability	23,060
Preconfirmation, Other liabilities	217,434
Preconfirmation, Total liabilities not subject to compromise	1,017,100
Preconfirmation, Liabilities subject to compromise	2,044,877
Stockholders’ equity:
Preconfirmation, Predecessor common stock	1,453
Preconfirmation, Predecessor additional paid-in capital	2,029,978
Preconfirmation, Predecessor treasury stock	(206,163)
Preconfirmation, Successor treasury stock	206,163
Preconfirmation, (Accumulated deficit)	(240,196)
Preconfirmation, Total stockholders’ equity	1,585,072
Preconfirmation, Total liabilities and stockholders’ equity	4,647,049
Stockholders’ equity:
Preconfirmation, Predecessor common stock	1,453
Preconfirmation, Predecessor treasury stock	(206,163)
Reorganization Adjustments
Current assets:
Preconfirmation, Cash and cash equivalents	(253,717)
Preconfirmation, Restricted cash	32,173
Preconfirmation, Prepaid expenses and other current assets	(15,484)
Preconfirmation, Total current assets	(237,028)
Preconfirmation, Drilling and other property and equipment, net of accumulated depreciation	182,985
Preconfirmation, Other assets	(112,454)
Preconfirmation, Total assets	(166,497)
Current liabilities:
Preconfirmation, Accounts payable	(996)
Preconfirmation, Accrued liabilities	(67,125)
Preconfirmation, Short-term debt	(442,034)
Preconfirmation, Finance lease right of use liabilities, current	15,148
Preconfirmation, Total current liabilities	(495,007)
Preconfirmation, Deferred tax liability	3,869
Preconfirmation, Other liabilities	(90,098)
Preconfirmation, Finance lease right of use liabilities, noncurrent	158,919
Preconfirmation, Long-term debt	285,982
Preconfirmation, Total liabilities not subject to compromise	(136,335)
Preconfirmation, Liabilities subject to compromise	(2,044,877)
Stockholders’ equity:
Preconfirmation, Predecessor common stock	(1,453)
Preconfirmation, Predecessor additional paid-in capital	(2,029,978)
Preconfirmation, Predecessor treasury stock	206,163
Preconfirmation, Successor additional paid-in capital	934,800
Preconfirmation, Successor treasury stock	(206,163)
Preconfirmation, (Accumulated deficit)	2,905,173
Preconfirmation, Total stockholders’ equity	2,014,715
Preconfirmation, Total liabilities and stockholders’ equity	(166,497)
Stockholders’ equity:
Preconfirmation, Predecessor common stock	(1,453)
Preconfirmation, Successor additional paid-in capital	934,800
Preconfirmation, Predecessor treasury stock	206,163
Reorganization Adjustments | Common Stock [Member]
Stockholders’ equity:
Preconfirmation, Predecessor common stock	10
Stockholders’ equity:
Preconfirmation, Predecessor common stock	$ 10