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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Cash flows from operating activities: |  |
Net loss | $ (339,780) | $ (120,172)
Adjustments to reconcile net loss to net cash provided by operating activities: |  |
Depreciation, depletion, amortization and impairment | 823,862 | 703,928
Impairment of goodwill | 17,800 |
Dry holes and abandonments | 94 | 569
Deferred income tax benefit | (79,498) | (24,617)
Stock-based compensation expense | 30,058 | 28,449
Net gain on asset disposals | (11,153) | (21,186)
Write-down of capacity reservation contract | 12,673 |
Provision for bad debts | 3,594 |
Amortization of debt discount and issuance costs | 668 | 607
Loss on early debt extinguishment | 8,247 |
Changes in operating assets and liabilities: |  |
Accounts receivable | 144,210 | (67,975)
Income taxes receivable/payable | (2,754) | 3,275
Inventory and other assets | 42,092 | (8,022)
Accounts payable | (44,270) | (31,935)
Accrued liabilities | (16,993) | 25,480
Other liabilities | (5,009) | 345
Net cash provided by operating activities | 583,841 | 488,746
Cash flows from investing activities: |  |
Acquisitions, net of cash acquired | (13) | (3,800)
Purchases of property and equipment | (283,288) | (480,568)
Proceeds from disposal of assets and insurance claims | 32,434 | 28,008
Collection of note receivable |  | 23,760
Net cash used in investing activities | (250,867) | (432,600)
Cash flows from financing activities: |  |
Purchases of treasury stock | (230,275) | (111,655)
Proceeds from exercise of options |  | 485
Dividends paid | (24,690) | (21,960)
Debt issuance costs | (150) | (4,469)
Proceeds from long-term debt | 150,000 | 521,194
Repayment of long-term debt | (308,061) |
Proceeds from borrowings under revolving credit facility |  | 79,000
Repayment of borrowings under revolving credit facility |  | (347,000)
Net cash provided by financing activities | (413,176) | 115,595
Effect of foreign exchange rate changes on cash | 2 | (537)
Net increase in cash and cash equivalents | (80,200) | 171,204
Cash and cash equivalents at beginning of period | 245,029 | 42,828
Cash and cash equivalents at end of period | 164,829 | 214,032
Net cash (paid) received during the period for: |  |
Interest, net of capitalized interest of $548 in 2019 and $1,094 in 2018 | (43,281) | (27,306)
Income taxes | (861) | 3,277
Non-cash investing and financing activities: |  |
Receivable from property and equipment insurance |  | 15,000
Net increase (decrease) in payables for purchases of property and equipment | (35,941) | 60,545
Net (increase) decrease in deposits on equipment purchases | 4,787 | $ (2,707)
Cashless exercise of stock options | $ 9,219 |

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