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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Cash flows from operating activities: |  |
Net income (loss) | $ (18,872) | $ 209,529
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |
Depletion, depreciation and accretion | 32,087 | 64,848
(Gain) loss on sale of oil and natural gas properties | 5,904 | (235,690)
Stock-based compensation, net | 7,818 | 21,290
Unrealized loss (gain) on derivative contracts | 26,761 | (42,219)
Amortization of deferred loan costs | 651 | 896
Amortization of discount and premium | 183 | 1,887
Loss (gain) on extinguishment of debt |  | 56,898
Accrued settlements on derivative contracts | 1,588 | (3,520)
Other income (expense) | (1,479) | (1,004)
Change in assets and liabilities: |  |
Accounts receivable | 331 | 34,982
Prepaids and other | (1,612) | 91
Accounts payable and accrued liabilities | (9,782) | 14,655
Net cash provided by (used in) operating activities | 43,578 | 122,643
Cash flows from investing activities: |  |
Oil and natural gas capital expenditures | (251,961) | (121,210)
Proceeds received from sale of oil and natural gas properties | 1,779 | 477,306
Acquisition of oil and natural gas properties | (332,901) | (907,487)
Acquisition of other operating property and equipment |  | (25,538)
Other operating property and equipment capital expenditures | (53,242) | (13,735)
Proceeds received from sale of other operating property and equipment | 1,899 | 10,352
Funds held in escrow and other | 155 | 285
Net cash provided by (used in) investing activities | (634,271) | (580,027)
Cash flows from financing activities: |  |
Proceeds from borrowings | 206,000 | 1,235,000
Repayments of borrowings |  | (1,118,000)
Cash payments to Noteholders |  | (30,917)
Debt issuance costs | (4,005) | (16,823)
Preferred stock issued |  | 400,055
Common stock issued | 63,480 |
Offering costs and other | (2,983) | (11,934)
Net cash provided by (used in) financing activities | 262,492 | 457,381
Net increase (decrease) in cash and cash equivalents | (328,201) | (3)
Cash and cash equivalents at beginning of period | 424,071 | 24
Cash and cash equivalents at end of period | 95,870 | 21
Disclosure of non-cash investing and financing activities: |  |
Asset retirement obligations | $ 2,047 | (5,972)
Accretion of non-cash preferred dividend |  | $ 48,007

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Period Type: | duration

X
- Definition Depreciation, depletion, amortization, and accretion related to oil and gas producing activities. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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