Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 91,686	$ 99,788
Receivables, net of allowance for doubtful accounts	303,323	269,917
Other current assets	45,077	18,902
Total current assets	440,086	388,607
Property, plant and equipment	3,868,507	3,782,288
Less accumulated depreciation and amortization	(2,491,060)	(2,445,014)
Net property, plant and equipment	1,377,447	1,337,274
Operating lease right of use assets	1,244,392	1,224,672
Financing lease right of use assets	15,464	16,890
Goodwill	2,004,145	1,936,426
Intangible assets, net	1,109,687	1,045,177
Other assets	90,816	98,448
Total assets	6,282,037	6,047,494
Current liabilities:
Trade accounts payable	15,920	16,429
Current maturities of long-term debt, net of deferred financing costs	239,696	174,778
Current operating lease liabilities	179,691	198,286
Current financing lease liabilities	1,331	1,331
Accrued expenses	99,220	135,038
Deferred income	155,554	137,103
Total current liabilities	691,412	662,965
Long-term debt	3,001,467	2,838,817
Operating lease liabilities	1,012,429	995,356
Financing lease liabilities	16,611	17,277
Deferred income tax liabilities	7,635	6,416
Asset retirement obligation	277,491	269,367
Other liabilities	34,926	40,207
Total liabilities	5,041,971	4,830,405
Stockholders’ equity:
Additional paid-in capital	2,042,427	2,001,399
Accumulated comprehensive income	486	855
Accumulated deficit	(741,651)	(734,415)
Treasury stock at cost	(61,298)	(50,852)
Stockholder's equity	1,240,066	1,217,089
Total liabilities and stockholders’ equity	6,282,037	6,047,494
Series AA PREF Stock
Stockholders’ equity:
Preferred stock, value	0	0
Class A CMN Stock
Stockholders’ equity:
Common stock, value	88	88
Class B CMN Stock
Stockholders’ equity:
Common stock, value	$ 14	$ 14