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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Current assets |  |
Cash and cash equivalents | $ 10,933 | $ 18,157
Accounts receivable, net | 141,312 | 100,623
Derivative instruments | 0 | 1,632
Prepaid and other current assets | 8,931 | 9,777
Total current assets | 161,176 | 130,189
Oil and natural gas properties, successful efforts method |  |
Unproved properties | 1,515,458 | 1,680,065
Proved properties | 3,704,555 | 2,895,280
Accumulated depreciation, depletion and amortization | (809,979) | (496,900)
Total oil and natural gas properties, net | 4,410,034 | 4,078,445
Other property and equipment, net | 14,799 | 8,837
Total property and equipment, net | 4,424,833 | 4,087,282
Noncurrent assets |  |
Operating lease right-of-use assets | 17,182 | 0
Other noncurrent assets | 42,940 | 42,550
TOTAL ASSETS | 4,646,131 | 4,260,021
Current liabilities |  |
Accounts payable and accrued expenses | 267,962 | 240,575
Derivative instruments | 4,433 | 6,051
Operating lease liabilities | 14,151 | 0
Other current liabilities | 942 | 1,090
Total current liabilities | 287,488 | 247,716
Noncurrent liabilities |  |
Long-term debt, net | 1,001,867 | 691,630
Asset retirement obligations | 14,629 | 13,895
Deferred income taxes | 84,471 | 62,167
Operating lease liabilities | 3,862 | 0
Other long-term liabilities | 0 | 744
Total liabilities | 1,392,317 | 1,016,152
Commitments and contingencies (Note 11) |  |
Shareholders’ equity |  |
Additional paid-in capital | 2,967,149 | 2,833,611
Retained earnings | 272,718 | 266,538
Total shareholders’ equity | 3,239,895 | 3,100,177
Noncontrolling interest | 13,919 | 143,692
Total equity | 3,253,814 | 3,243,869
TOTAL LIABILITIES AND EQUITY | 4,646,131 | 4,260,021
Preferred Stock Series A |  |
Shareholders’ equity |  |
Preferred stock, $0.0001 par value, 1,000,000 shares authorized: | 0 | 0
Class A |  |
Shareholders’ equity |  |
Common stock, $0.0001 par value, 620,000,000 shares authorized: | 28 | 27
Convertible Class C |  |
Shareholders’ equity |  |
Common stock, $0.0001 par value, 620,000,000 shares authorized: | $ 0 | $ 1

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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