Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 238,757	$ 99,760
Accounts receivable, net	112,580	63,803
Inventories	30,704	21,535
Prepaid expenses and other current assets	50,507	42,879
Total current assets	432,548	227,977
Property and equipment, net:
Property and equipment, at cost	1,949,352	1,862,764
Accumulated depreciation	(734,357)	(664,610)
Total property and equipment, net	1,214,995	1,198,154
Other assets:
Debt issuance costs	4,487	5,386
Restricted-use investment securities	3,840	3,036
Deposits and other assets	8,013	7,211
Goodwill	630,248	630,248
Intangible assets, net of accumulated amortization	354,661	356,428
Total other assets	1,001,249	1,002,309
Total assets	2,648,792	2,428,440
Current liabilities:
Accounts payable	40,928	25,570
Accrued compensation, payroll taxes and benefits	23,572	46,583
Accrued insurance reserves	42,989	40,796
Accrued interest payable	13,303	19,555
Other accrued liabilities	39,240	34,714
Deferred income	147,732	97,334
Current portion of long-term debt	533	7,506
Total current liabilities	308,297	272,058
Noncurrent liabilities:
Long-term debt	1,652,190	1,498,022
Other long-term liabilities	53,523	58,150
Deferred income taxes	198,508	140,273
Total noncurrent liabilities	1,904,221	1,696,445
Total liabilities	2,212,518	1,968,503
Redeemable noncontrolling interests	454,674	435,721
Stockholders' equity (deficit):
Common stock, $0.025 par value, 140,000,000 shares authorized; 92,041,655 and 91,550,851 shares issued and outstanding at September 30, 2016 and December 31, 2015, respectively	2,301	2,289
Capital in excess of par value	1,147,453	1,041,710
Accumulated deficit	(1,100,472)	(953,225)
Accumulated other comprehensive loss, net of tax	(67,682)	(66,558)
Total stockholders' (deficit) equity	(18,400)	24,216
Total liabilities and equity (deficit)	$ 2,648,792	$ 2,428,440