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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 3,488 $ 1,097
Accounts receivable, trade, net of allowance 108,936 104,425
Inventory 66,630 63,670
Other current assets 7,652 12,819
Total current assets 186,706 182,011
Property, plant and equipment, net 2,252,226 2,389,674
Operating lease ROU assets 18,256 19,236
Intangible assets, net 50,815 61,531
Contract costs, net 24,375 29,216
Deferred tax assets 48,227 56,934
Other assets 27,502 30,084
Noncurrent assets associated with discontinued operations 10,117 11,036
Total assets 2,618,224 2,779,722
Current liabilities:    
Accounts payable, trade 44,685 30,819
Accrued liabilities 104,753 76,993
Deferred revenue 3,985 3,880
Total current liabilities 153,423 111,692
Long-term debt 1,516,135 1,688,867
Operating lease liabilities 16,454 16,925
Deferred tax liabilities 801 725
Other liabilities 19,496 18,088
Noncurrent liabilities associated with discontinued operations 7,868 7,868
Total liabilities 1,714,177 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, 161,459,405 and 160,014,960 shares issued, respectively 1,614 1,600
Additional paid-in capital 3,437,298 3,424,624
Accumulated other comprehensive loss (2,028) (5,006)
Accumulated deficit (2,446,755) (2,401,988)
Treasury stock: 7,402,188 and 7,052,769 common shares, at cost, respectively (86,082) (83,673)
Total equity 904,047 935,557
Total liabilities and equity $ 2,618,224 $ 2,779,722