Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 44,605	$ 52,619
Receivables, net of allowance for doubtful accounts of $12,477 and $11,418 as of 2023 and 2022, respectively	301,189	285,039
Other current assets	27,392	26,894
Total current assets	373,186	364,552
Property, plant and equipment (note 5)	4,274,831	4,109,146
Less accumulated depreciation and amortization	(2,708,361)	(2,609,447)
Net property, plant and equipment	1,566,470	1,499,699
Operating lease right of use assets	1,315,433	1,271,631
Financing lease right of use assets	11,184	14,037
Goodwill	2,035,271	2,035,269
Intangible assets, net (note 6)	1,171,434	1,206,625
Other assets	90,644	83,401
Total assets	6,563,622	6,475,214
Current liabilities:
Trade accounts payable	18,238	19,643
Current maturities of long-term debt, net of deferred financing costs of $380 and $593 in 2023 and 2022, respectively (note 9)	250,018	249,785
Current operating lease liabilities (note 7)	210,568	205,838
Current financing lease liabilities (note 7)	1,331	1,331
Accrued expenses (note 8)	107,195	117,593
Deferred income	126,547	131,847
Total current liabilities	713,897	726,037
Long-term debt, net of deferred financing costs of $28,865 and $32,022 in 2023 and 2022, respectively (note 9)	3,091,109	3,063,020
Operating lease liabilities (note 7)	1,075,285	1,035,655
Financing lease liabilities (note 7)	14,614	15,945
Deferred income tax liabilities (note 12)	12,047	9,651
Asset retirement obligation (note 10)	397,991	390,442
Other liabilities	41,891	39,090
Total liabilities	5,346,834	5,279,840
Stockholders’ equity (note 14):
Series AA preferred stock, par value $0.001, $63.80 cumulative dividends, authorized 5,720 shares; 5,720 shares issued and outstanding at 2023 and 2022	0	0
Additional paid-in-capital	2,103,282	2,061,671
Accumulated comprehensive loss	(428)	(659)
Accumulated deficit	(819,235)	(804,382)
Cost of shares held in treasury, 840,935 and 783,696 shares in 2023 and 2022, respectively	(67,347)	(61,358)
Non-controlling interest	414	0
Stockholders’ equity	1,216,788	1,195,374
Total liabilities and stockholders’ equity	6,563,622	6,475,214
Common Class A
Stockholders’ equity (note 14):
Common stock, value	88	88
Common Class B
Stockholders’ equity (note 14):
Common stock, value	$ 14	$ 14