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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Cash flows from operating activities: |  |
Net loss | $ (63,539) | $ (70,503)
Adjustments to reconcile net loss to net cash provided by operating activities: |  |
Depreciation, depletion, amortization and impairment | 156,217 | 176,770
Deferred income tax benefit | (36,947) | (11,616)
Stock-based compensation expense | 7,131 | 7,211
Net gain on asset disposals | (13,560) | (2,445)
Tax expense on stock-based compensation |  | (323)
Amortization of debt issuance costs | 87 | 362
Changes in operating assets and liabilities: |  |
Accounts receivable | (62,291) | 37,362
Income taxes receivable | 248 | (3,346)
Inventory and other assets | 9,931 | 2,973
Accounts payable | 11,252 | (14,888)
Accrued expenses | (3,233) | (7,196)
Other liabilities | 261 | (628)
Net cash provided by operating activities | 5,557 | 113,733
Cash flows from investing activities: |  |
Purchases of property and equipment | (68,440) | (21,301)
Proceeds from disposal of assets | 25,861 | 5,100
Net cash used in investing activities | (42,579) | (16,201)
Cash flows from financing activities: |  |
Proceeds from equity offering | 471,570 |
Dividends paid | (3,326) | (14,712)
Repayment of long-term debt |  | (10,000)
Proceeds from borrowings under revolving credit facility | 10,000 |
Repayment of borrowings under revolving credit facility | (10,000) |
Net cash provided by (used in) financing activities | 468,244 | (24,712)
Effect of foreign exchange rate changes on cash | 234 | 391
Net increase in cash and cash equivalents | 431,456 | 73,211
Cash and cash equivalents at beginning of period | 35,152 | 113,346
Cash and cash equivalents at end of period | 466,608 | 186,557
Net cash (paid) received during the period for: |  |
Interest, net of capitalized interest of $155 in 2017 and $185 in 2016 | (634) | (3,773)
Income taxes | 248 | 19,625
Non-cash investing and financing activities: |  |
Net increase in payables for purchases of property and equipment | 21,297 | 14,063
Net (increase) decrease in deposits on equipment purchases | $ (3,056) | $ 3,972

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- Definition The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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=66902209&loc=d3e3602-108585 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration