Guarantor Subsidiaries - Schedule of Condensed Consolidating Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets:
Cash and cash equivalents	$ 32,774	$ 314,466	$ 275,841	$ 128,836
Accounts receivable, net of allowance for doubtful accounts	72,943	51,415
Other current assets	84,064	1,782
Property and equipment, net	2,029,523	1,018,880
Intercompany receivable		0
Investment in subsidiaries	0	0
Noncurrent assets	33,156	4,163
Total	2,252,460	1,390,706
Liabilities and Stockholders' Equity:
Accounts payable and accrued liabilities	131,379	84,055
Other current liabilities	116,806	64,879
Intercompany payable		0
Long-term debt, net of debt issuance costs	617,387	617,744
Deferred income taxes	139,534	0
Other noncurrent liabilities	35,256	25,474
Stockholders' equity	1,212,098	598,554	571,543	549,416
Total	2,252,460	1,390,706
Reportable Legal Entities [Member] | Parent Guarantor
Assets:
Cash and cash equivalents	0	0
Accounts receivable, net of allowance for doubtful accounts	0
Other current assets	0
Property and equipment, net	0
Investment in subsidiaries	1,212,098
Noncurrent assets	0
Total	1,212,098
Liabilities and Stockholders' Equity:
Accounts payable and accrued liabilities	0
Other current liabilities	0
Long-term debt, net of debt issuance costs	0
Deferred income taxes	0
Other noncurrent liabilities	0
Stockholders' equity	1,212,098
Total	1,212,098
Reportable Legal Entities [Member] | Subsidiary Issuer [Member]
Assets:
Cash and cash equivalents	32,774	314,466
Accounts receivable, net of allowance for doubtful accounts	72,943
Other current assets	84,064
Property and equipment, net	2,029,523
Investment in subsidiaries	0
Noncurrent assets	33,156
Total	2,252,460
Liabilities and Stockholders' Equity:
Accounts payable and accrued liabilities	131,379
Other current liabilities	116,806
Long-term debt, net of debt issuance costs	617,387
Deferred income taxes	139,534
Other noncurrent liabilities	35,256
Stockholders' equity	1,212,098
Total	2,252,460
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Assets:
Cash and cash equivalents		0	0	0
Accounts receivable, net of allowance for doubtful accounts		0
Other current assets		0
Property and equipment, net		1,894
Intercompany receivable		0
Investment in subsidiaries		0
Noncurrent assets		0
Total		1,894
Liabilities and Stockholders' Equity:
Accounts payable and accrued liabilities		0
Other current liabilities		0
Intercompany payable		854
Long-term debt, net of debt issuance costs		0
Other noncurrent liabilities		0
Stockholders' equity		1,040
Total		1,894
Reportable Legal Entities [Member] | Parent Issuer [Member]
Assets:
Cash and cash equivalents		314,466	275,841	128,836
Accounts receivable, net of allowance for doubtful accounts		51,415
Other current assets		1,782
Property and equipment, net		1,016,986
Intercompany receivable		854
Investment in subsidiaries		1,040
Noncurrent assets		4,163
Total		1,390,706
Liabilities and Stockholders' Equity:
Accounts payable and accrued liabilities		84,055
Other current liabilities		64,879
Intercompany payable		0
Long-term debt, net of debt issuance costs		617,744
Other noncurrent liabilities		25,474
Stockholders' equity		598,554
Total		1,390,706
Intercompany Eliminations [Member]
Assets:
Cash and cash equivalents	0	0	$ 0	$ 0
Accounts receivable, net of allowance for doubtful accounts	0	0
Other current assets	0	0
Property and equipment, net	0	0
Intercompany receivable		(854)
Investment in subsidiaries	(1,212,098)	(1,040)
Noncurrent assets	0	0
Total	(1,212,098)	(1,894)
Liabilities and Stockholders' Equity:
Accounts payable and accrued liabilities	0	0
Other current liabilities	0	0
Intercompany payable		(854)
Long-term debt, net of debt issuance costs	0	0
Deferred income taxes	0
Other noncurrent liabilities	0	0
Stockholders' equity	(1,212,098)	(1,040)
Total	$ (1,212,098)	$ (1,894)