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CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 10,124 | $ 52,297
Accounts receivable—oil and natural gas sales | 112,657 | 210,200
Accounts receivable—joint interest and other | 41,327 | 22,497
Prepaid expenses and other current assets | 5,658 | 10,017
Short-term derivative instruments | 134,571 | 21,352
Total current assets | 304,337 | 316,363
Property and equipment: |  |
Oil and natural gas properties, full-cost accounting, $2,260,759 and $2,873,037 excluded from amortization in 2019 and 2018, respectively | 10,551,713 | 10,026,836
Other property and equipment | 96,233 | 92,667
Accumulated depletion, depreciation, amortization and impairment | (5,616,988) | (4,640,098)
Property and equipment, net | 5,030,958 | 5,479,405
Other assets: |  |
Equity investments | 73,962 | 236,121
Long-term derivative instruments | 23,419 | 0
Deferred tax asset | 323,378 | 0
Inventories | 7,022 | 5,344
Operating lease assets | 13,920 |
Operating lease assets - related parties | 48,449 |
Other assets | 11,653 | 13,803
Total other assets | 501,803 | 255,268
Total assets | 5,837,098 | 6,051,036
Current liabilities: |  |
Accounts payable and accrued liabilities | 439,019 | 518,380
Short-term derivative instruments | 429 | 20,401
Current portion of operating lease liabilities | 12,848 |
Current portion of operating lease liabilities - related parties | 21,017 |
Current maturities of long-term debt | 622 | 651
Total current liabilities | 473,935 | 539,432
Long-term derivative instruments | 72,040 | 13,992
Asset retirement obligation—long-term | 59,819 | 79,952
Uncertain tax position liability | 3,127 | 3,127
Non-current operating lease liabilities | 1,072 |
Non-current operating lease liabilities - related parties | 27,432 |
Long-term debt, net of current maturities | 2,076,569 | 2,086,765
Total liabilities | 2,713,994 | 2,723,268
Commitments and contingencies (Note 8) |  |
Preferred stock, $0.01 par value; 5,000,000 shares authorized (30,000 authorized as redeemable 12% cumulative preferred stock, Series A), and none issued and outstanding | 0 | 0
Stockholders’ equity: |  |
Common stock - $0.01 par value, 200,000,000 shares authorized, 159,709,221 issued and outstanding at September 30, 2019 and 162,986,045 at December 31, 2018 | 1,597 | 1,630
Paid-in capital | 4,205,158 | 4,227,532
Accumulated other comprehensive loss | (50,679) | (56,026)
Accumulated deficit | (1,032,972) | (845,368)
Total stockholders’ equity | 3,123,104 | 3,327,768
Total liabilities and stockholders’ equity | $ 5,837,098 | $ 6,051,036

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