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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 458 $ 546
Accounts receivable, less allowance for doubtful accounts of $3,004 and $8,784 252,642 272,900
Derivative assets 23,332 136,848
Prepaid and other current assets 13,408 17,508
Total current assets 289,840 427,802
Derivative assets 16,680 706
Natural gas and oil properties, successful efforts method [1] 9,751,114 10,213,737
Accumulated depletion and depreciation (4,064,305) (4,172,702) [1]
Natural gas and oil properties, successful efforts method, net [1] 5,686,809 6,041,035
Other property and equipment 79,878 102,083
Accumulated depreciation and amortization (75,717) (96,708)
Other Property and equipment, net 4,161 5,375
Operating lease right-of-use assets 63,581 62,053
Other assets 75,865 75,432
Total assets 6,136,936 6,612,403
Current liabilities:    
Accounts payable 132,421 155,341
Asset retirement obligations 6,689 2,393
Accrued liabilities 348,333 356,392
Accrued interest 54,742 39,299
Derivative liabilities 26,707 13,119
Divestiture contract obligation 92,593  
Current maturities of long-term debt 45,356  
Total current liabilities 706,841 566,544
Bank debt 693,123 464,319
Senior notes 2,329,745 2,659,844
Senior subordinated notes 17,384 48,774
Deferred tax liabilities 135,267 160,196
Derivative liabilities 9,746 949
Deferred compensation liabilities 81,481 64,070
Operating lease liabilities 43,155 41,068
Asset retirement obligations and other liabilities 91,157 259,151
Divestiture contract obligation 391,502  
Total liabilities 4,499,401 4,264,915
Commitments and contingencies
Stockholders' Equity    
Preferred stock, $1 par 10,000,000 shares authorized, none issued and outstanding 0 0
Common stock, $0.01 par 475,000,000 shares authorized, 251,438,936 issued at December 31, 2019 and 249,519,687 issued at December 31, 2018 2,563 2,514
Common stock held in treasury, at cost, 1,808,133 shares at December 31, 2019 and 9,665 shares at December 31, 2018 (30,132) (7,236)
Additional paid-in capital 5,684,268 5,659,832
Accumulated other comprehensive loss (479) (788)
Retained deficit (4,018,685) (3,306,834)
Total stockholders' equity 1,637,535 2,347,488
Total liabilities and stockholders' equity $ 6,136,936 $ 6,612,403
[1] Includes capitalized asset retirement costs and the associated accumulated amortization.