Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 52,619	$ 99,788
Receivables, net of allowance for doubtful accounts of $11,418 and $11,195 as of 2022 and 2021, respectively	285,039	269,917
Other current assets	26,894	18,902
Total current assets	364,552	388,607
Property, plant and equipment (note 5)	4,109,146	3,782,288
Less accumulated depreciation and amortization	(2,609,447)	(2,445,014)
Net property, plant and equipment	1,499,699	1,337,274
Operating lease right of use assets	1,271,631	1,224,672
Financing lease right of use assets	14,037	16,890
Goodwill	2,035,269	1,936,426
Intangible assets, net (note 6)	1,206,625	1,045,177
Other assets	83,401	98,448
Total assets	6,475,214	6,047,494
Current liabilities:
Trade accounts payable	19,643	16,429
Current maturities of long-term debt, net of deferred financing costs of $593 and $585 in 2022 and 2021, respectively (note 9)	249,785	174,778
Current operating lease liabilities (note 7)	205,838	198,286
Current financing lease liabilities (note 7)	1,331	1,331
Accrued expenses (note 8)	117,593	135,038
Deferred income	131,847	137,103
Total current liabilities	726,037	662,965
Long-term debt, net of deferred financing costs of $32,022 and $36,274 in 2022 and 2021, respectively (note 9)	3,063,020	2,838,817
Operating lease liabilities (note 7)	1,035,655	995,356
Financing lease liabilities (note 7)	15,945	17,277
Deferred income tax liabilities (note 12)	9,651	6,416
Asset retirement obligation (note 10)	390,442	269,367
Other liabilities	39,090	40,207
Total liabilities	5,279,840	4,830,405
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 2022 and 2021	0	0
Additional paid-in-capital	2,061,671	2,001,399
Accumulated comprehensive (loss) income	(659)	855
Accumulated deficit	(804,382)	(734,415)
Cost of shares held in treasury, 783,696 and 688,017 shares in 2022 and 2021, respectively	(61,358)	(50,852)
Stockholders’ equity	1,195,374	1,217,089
Total liabilities and stockholders’ equity	6,475,214	6,047,494
Common Class A
Stockholders’ equity (note 14):
Common stock, value	88	88
Common Class B
Stockholders’ equity (note 14):
Common stock, value	$ 14	$ 14