Condensed Consolidating Balance Sheet (Unaudited) (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 20,499	$ 52,802
Restricted cash	32,901	21,335
Accounts receivable, net of allowance	273,567	270,597
Prepaid expenses and other current assets	28,364	28,791
Total current assets	355,331	373,525
Real estate and related assets:
Property and equipment, net	2,794,767	2,830,589
Other real estate assets	244,479	247,223
Goodwill	48,169	48,169
Non-current deferred tax assets	13,807	14,947
Other assets	213,827	141,207
Total assets	3,670,380	3,655,660
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	330,617	352,275
Current portion of long-term debt	15,448	14,121
Total current liabilities	346,065	366,396
Long-term debt, net	1,828,114	1,787,555
Deferred revenue	22,694	26,102
Other liabilities	91,093	60,548
Total liabilities	2,287,966	2,240,601
Total stockholders' equity	1,382,414	1,415,059	$ 1,434,210	$ 1,451,608
Total liabilities and stockholders' equity	3,670,380	3,655,660
Reportable Legal Entities | Parent
ASSETS
Cash and cash equivalents	220	11,109
Accounts receivable, net of allowance	204,817	254,766
Prepaid expenses and other current assets	3,288	4,412
Total current assets	208,325	270,287
Real estate and related assets:
Property and equipment, net	2,252,514	2,255,361
Other real estate assets	244,479	247,223
Goodwill	33,057	33,057
Non-current deferred tax assets	1,153	727
Other assets	534,288	507,161
Total assets	3,273,816	3,313,816
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	271,625	294,474
Current portion of long-term debt	9,983	8,720
Total current liabilities	281,608	303,194
Long-term debt, net	1,590,001	1,579,273
Non-current deferred tax liabilities	1,751	1,165
Other liabilities	18,042	15,125
Total liabilities	1,891,402	1,898,757
Total stockholders' equity	1,382,414	1,415,059
Total liabilities and stockholders' equity	3,273,816	3,313,816
Reportable Legal Entities | Combined Subsidiary Guarantors
ASSETS
Cash and cash equivalents	20,049	40,348
Accounts receivable, net of allowance	495,734	445,105
Prepaid expenses and other current assets	28,169	26,939
Total current assets	543,952	512,392
Real estate and related assets:
Property and equipment, net	263,499	310,989
Goodwill	15,112	15,112
Non-current deferred tax assets	12,654	14,220
Other assets	131,794	61,104
Total assets	967,011	913,817
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	381,859	377,699
Total current liabilities	381,859	377,699
Long-term debt, net	114,483	114,428
Deferred revenue	22,694	26,102
Other liabilities	73,051	45,423
Total liabilities	592,087	563,652
Total stockholders' equity	374,924	350,165
Total liabilities and stockholders' equity	967,011	913,817
Reportable Legal Entities | Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	230	1,345
Restricted cash	32,901	21,335
Accounts receivable, net of allowance	1,830	1,809
Prepaid expenses and other current assets	1,021	1,951
Total current assets	35,982	26,440
Real estate and related assets:
Property and equipment, net	278,754	264,239
Non-current deferred tax assets	1,751	1,165
Other assets	37,485	38,112
Total assets	353,972	329,956
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	110,026	115,661
Current portion of long-term debt	5,465	5,401
Total current liabilities	115,491	121,062
Long-term debt, net	238,630	208,854
Total liabilities	354,121	329,916
Total stockholders' equity	(149)	40
Total liabilities and stockholders' equity	353,972	329,956
Consolidating Adjustments and Other
ASSETS
Accounts receivable, net of allowance	(428,814)	(431,083)
Prepaid expenses and other current assets	(4,114)	(4,511)
Total current assets	(432,928)	(435,594)
Real estate and related assets:
Non-current deferred tax assets	(1,751)	(1,165)
Other assets	(489,740)	(465,170)
Total assets	(924,419)	(901,929)
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued expenses	(432,893)	(435,559)
Total current liabilities	(432,893)	(435,559)
Long-term debt, net	(115,000)	(115,000)
Non-current deferred tax liabilities	(1,751)	(1,165)
Total liabilities	(549,644)	(551,724)
Total stockholders' equity	(374,775)	(350,205)
Total liabilities and stockholders' equity	$ (924,419)	$ (901,929)