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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 3,312 $ 1,097
Accounts receivable, trade, net of allowance 106,393 104,425
Inventory 65,885 63,670
Other current assets 12,265 12,819
Total current assets 187,855 182,011
Property, plant and equipment, net 2,322,400 2,389,674
Operating lease ROU assets 18,404 19,236
Intangible assets, net 54,684 61,531
Contract costs, net 24,661 29,216
Deferred tax assets 51,294 56,934
Other assets 25,936 30,084
Noncurrent assets associated with discontinued operations 10,424 11,036
Total assets 2,695,658 2,779,722
Current liabilities:    
Accounts payable, trade 45,096 30,819
Accrued liabilities 77,376 76,993
Deferred revenue 3,078 3,880
Total current liabilities 125,550 111,692
Long-term debt 1,612,490 1,688,867
Operating lease liabilities 16,446 16,925
Deferred tax liabilities 761 725
Other liabilities 18,722 18,088
Noncurrent liabilities associated with discontinued operations 7,868 7,868
Total liabilities 1,781,837 1,844,165
Commitments and contingencies
Equity:    
Preferred stock: $0.01 par value per share, 50,000,000 shares authorized, zero issued
Common stock: $0.01 par value per share, 250,000,000 shares authorized, 161,339,554 and 160,014,960 shares issued, respectively 1,613 1,600
Additional paid-in capital 3,434,224 3,424,624
Accumulated other comprehensive loss (3,044) (5,006)
Accumulated deficit (2,433,553) (2,401,988)
Treasury stock: 7,278,449 and 7,052,769 common shares, at cost, respectively (85,419) (83,673)
Total equity 913,821 935,557
Total liabilities and equity $ 2,695,658 $ 2,779,722