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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 532,544 $ 195,397
Accounts receivable, net of allowance for doubtful accounts of $565 and $614, respectively 25,026 70,393
Prepaid expenses and other 16,463 9,631
Current assets held for sale 0 1,133,294
Total current assets 574,033 1,408,715
Investments 13,410 13,769
Property, plant and equipment, net 525,799 440,427
Goodwill and Intangible assets, net 106,146 106,759
Operating lease right-of-use assets 56,952 50,387
Deferred charges and other assets 16,750 11,650
Total assets 1,293,090 2,031,707
Current liabilities:    
Current maturities of long-term debt, net of unamortized loan fees 0 688,463
Accounts payable 17,433 19,599
Advanced billings and customer deposits 9,510 8,594
Accrued compensation 9,482 16,413
Income taxes payable 432,760 6,951
Current operating lease liabilities 2,648 1,970
Accrued liabilities and other 13,590 13,869
Current liabilities held for sale 0 452,202
Total current liabilities 485,423 1,208,061
Other long-term liabilities:    
Deferred income taxes 60,231 150,652
Asset retirement obligations 9,364 4,955
Benefit plan obligations 12,490 14,645
Non-current operating lease liabilities 51,786 46,095
Other liabilities 25,030 24,905
Total other long-term liabilities 158,901 241,252
Commitments and contingencies
Shareholders’ equity:    
Common stock, no par value, authorized 96,000; 49,965 and 49,868 issued and outstanding at September 30, 2021 and December 31, 2020, respectively 0 0
Additional paid in capital 47,832 47,317
Retained earnings 600,934 539,783
Accumulated other comprehensive loss, net of taxes 0 (4,706)
Total shareholders’ equity 648,766 582,394
Total liabilities and shareholders’ equity $ 1,293,090 $ 2,031,707