Condensed Consolidating Balance Sheet (Unaudited) (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 47,537			$ 52,802
Restricted cash	25,541			21,335
Accounts receivable, net of allowance	271,594			270,597
Prepaid expenses and other current assets	35,973			28,791
Total current assets	380,645			373,525
Real estate and related assets:
Property and equipment, net	2,836,841			2,830,589
Other real estate assets	239,149			247,223
Goodwill	48,169			48,169
Non-current deferred tax assets	18,951			14,947
Other assets	225,090			141,207
Total assets	3,748,845			3,655,660
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	372,411			352,275
Current portion of long-term debt, net	342,391			14,121
Total current liabilities	714,802			366,396
Long-term debt, net	1,521,785			1,787,555
Deferred revenue	15,877			26,102
Other liabilities	113,180			60,548
Total liabilities	2,365,644			2,240,601
Total stockholders' equity	1,383,201	$ 1,382,591	$ 1,382,414	1,415,059	$ 1,422,075	$ 1,427,918	$ 1,434,210	$ 1,451,608
Total liabilities and stockholders' equity	3,748,845			3,655,660
Reportable Legal Entities | Parent
ASSETS
Cash and cash equivalents	18,481			11,109
Accounts receivable, net of allowance	167,096			254,766
Prepaid expenses and other current assets	3,210			4,412
Total current assets	188,787			270,287
Real estate and related assets:
Property and equipment, net	2,234,415			2,255,361
Other real estate assets	239,149			247,223
Goodwill	33,057			33,057
Non-current deferred tax assets				727
Other assets	593,681			507,161
Total assets	3,289,089			3,313,816
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	315,790			294,474
Current portion of long-term debt, net	335,909			8,720
Total current liabilities	651,699			303,194
Long-term debt, net	1,235,797			1,579,273
Non-current deferred tax liabilities	281			1,165
Other liabilities	18,111			15,125
Total liabilities	1,905,888			1,898,757
Total stockholders' equity	1,383,201			1,415,059
Total liabilities and stockholders' equity	3,289,089			3,313,816
Reportable Legal Entities | Combined Subsidiary Guarantors
ASSETS
Cash and cash equivalents	28,164			40,348
Restricted cash	4
Accounts receivable, net of allowance	558,325			445,105
Prepaid expenses and other current assets	33,281			26,939
Total current assets	619,774			512,392
Real estate and related assets:
Property and equipment, net	273,315			310,989
Goodwill	15,112			15,112
Non-current deferred tax assets	16,982			14,220
Other assets	147,211			61,104
Total assets	1,072,394			913,817
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	409,644			377,699
Current portion of long-term debt, net	47,937
Total current liabilities	457,581			377,699
Long-term debt, net	66,658			114,428
Deferred revenue	15,877			26,102
Other liabilities	95,069			45,423
Total liabilities	635,185			563,652
Total stockholders' equity	437,209			350,165
Total liabilities and stockholders' equity	1,072,394			913,817
Reportable Legal Entities | Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	892			1,345
Restricted cash	25,537			21,335
Accounts receivable, net of allowance	(157)			1,809
Prepaid expenses and other current assets	3,540			1,951
Total current assets	29,812			26,440
Real estate and related assets:
Property and equipment, net	329,111			264,239
Non-current deferred tax assets	2,250			1,165
Other assets	36,230			38,112
Total assets	397,403			329,956
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	104,670			115,661
Current portion of long-term debt, net	6,545			5,401
Total current liabilities	111,215			121,062
Long-term debt, net	286,330			208,854
Total liabilities	397,545			329,916
Total stockholders' equity	(142)			40
Total liabilities and stockholders' equity	397,403			329,956
Consolidating Adjustments and Other
ASSETS
Accounts receivable, net of allowance	(453,670)			(431,083)
Prepaid expenses and other current assets	(4,058)			(4,511)
Total current assets	(457,728)			(435,594)
Real estate and related assets:
Non-current deferred tax assets	(281)			(1,165)
Other assets	(552,032)			(465,170)
Total assets	(1,010,041)			(901,929)
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	(457,693)			(435,559)
Current portion of long-term debt, net	(48,000)
Total current liabilities	(505,693)			(435,559)
Long-term debt, net	(67,000)			(115,000)
Non-current deferred tax liabilities	(281)			(1,165)
Total liabilities	(572,974)			(551,724)
Total stockholders' equity	(437,067)			(350,205)
Total liabilities and stockholders' equity	$ (1,010,041)			$ (901,929)