Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
NET INCOME (LOSS)	$ 152,127	$ (1,103)	$ 26,712
Adjustment to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	148,251	146,996	166,396
Amortization of other non-current assets	890	91	337
Amortization of intangible assets	667	732	937
Loss related to casualty disasters	1,557	3,051	1,824
Write off of deferred costs	0	0	18
Amortization of leasehold interests	(497)	(647)	(691)
Amortization of deferred costs	5,987	5,708	5,559
Impairment loss	1,178	104,258	50,121
(Gain) loss on sale or retirement of assets	(1,180)	(4,908)	4,533
Equity-based compensation	15,995	14,171	21,603
Deferred taxes	(112,285)	(11,800)	16,898
Provision for doubtful accounts	1,918	1,470	2,198
Changes in assets and liabilities:
Accounts receivable	2,060	(8,762)	(105)
Other current assets	(2,072)	2,123	(484)
Other non-current assets	(29,002)	537	(1,410)
Accounts payable	(13,710)	2,321	272
Accrued payroll and employee benefits	13,646	7,549	(4,278)
Accrued real estate taxes	(618)	(305)	1,135
Accrued expenses and other liabilities	(5,017)	1,446	(8,035)
Other long-term liabilities	2,187	1,445	1,039
Net cash provided by operating activities	182,082	264,373	284,579
Cash flows from investing activities:
Capital expenditures	(217,480)	(143,752)	(91,970)
Insurance proceeds on casualty disasters	5,685	3,722	4,883
Proceeds from sale of assets	32,620	71,136	37,576
Payment of franchise incentives	(1,867)	(1,938)	(30)
Decrease in other non-current assets	0	0	1,125
Net cash used in investing activities	(181,042)	(70,832)	(48,416)
Cash flows from financing activities:
Repayment of long-term debt	(17,514)	(17,514)	(152,622)
Purchase of treasury stock	(2,938)	(101,824)	(106,167)
Distributions to noncontrolling interests	(335)	(316)	(522)
Net cash used in financing activities	(20,787)	(119,654)	(259,311)
(Decrease) increase in cash and cash equivalents	(19,747)	73,887	(23,148)
Cash and cash equivalents at the beginning of the year	160,596	86,709	109,857
Cash and cash equivalents at the end of the year	140,849	160,596	86,709
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid during the year	77,073	76,634	83,468
Income taxes paid during the year, net of refunds	21,846	9,856	12,357
SUPPLEMENTAL NON-CASH DISCLOSURE:
Capital expenditures included in accounts payable	13,824	5,646	2,836
Cash flow hedge adjustment, net of tax	5,612	1,064	(4,309)
Receivable for capital assets damaged by casualty disasters	$ 22,587	$ 4,127	$ 4,625