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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Cash flows from operating activities: |  |
Net income | $ 82,558 | $ 44,559
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Accretion of discount—Asset Retirement Obligation | 188 | 175
Depletion, depreciation and amortization | 56,877 | 22,583
Stock-based compensation expense | 2,584 | 901
Gain from equity investments | (43,688) | (61,210)
Interest income - note receivable | (13) |
Unrealized loss on derivative instruments | 8,665 | 171
Deferred income tax expense | 33,564 | 28,195
Amortization of loan commitment fees | 294 | 254
Amortization of note discount and premium | 78 | 72
Changes in operating assets and liabilities: |  |
(Increase) decrease in accounts receivable | (27,944) | 3,592
Decrease (increase) in accounts receivable—related party | 2,047 | (2,214)
(Increase) decrease in prepaid expenses | (771) | 71
Increase (decrease) in accounts payable and accrued liabilities | 43,406 | (1,362)
Settlement of asset retirement obligation | (1,695) | (780)
Net cash provided by operating activities | 156,150 | 35,007
Cash flows from investing activities: |  |
Deductions to cash held in escrow | 8 | 0
Additions to other property and equipment | (1,002) | (262)
Additions to oil and gas properties | (420,431) | (320,489)
Contributions to equity method investments | (23,687) | (12,653)
Distributions from equity method investments | 0 | 188
Net cash used in investing activities | (445,112) | (333,216)
Cash flows from financing activities: |  |
Principal payments on borrowings | (42) | (37)
Debt issuance costs and loan commitment fees | (185) | (502)
Proceeds from issuance of common stock, net of offering costs and exercise of stock options | 615 | 357,640
Net cash provided by financing activities | 388 | 357,101
Net (decrease) increase in cash and cash equivalents | (288,574) | 58,892
Cash and cash equivalents at beginning of period | 458,956 | 167,088
Cash and cash equivalents at end of period | 170,382 | 225,980
Supplemental disclosure of cash flow information: |  |
Interest payments | 18 | 35
Income tax payments | 13,000 | 750
Supplemental disclosure of non-cash transactions: |  |
Capitalized stock based compensation | 1,723 | 601
Asset retirement obligation capitalized | 1,869 | 670
Interest capitalized | 2,318 | 2,629
Foreign currency translation loss on investment in Grizzly Oil Sands ULC | $ (7,278) | $ (3,567)

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- Definition The cash outflow for loan origination associated cost which is usually collected through escrow. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow to purchase of mineral interests in oil and gas properties for use in the normal oil and gas operations and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow for acquisition of or capital improvements of property, plant and equipment, used to produce goods or deliver services, and not otherwise defined in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + 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 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References No definition available. + Details
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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=31042434&loc=d3e3602-108585 + Details
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- Details
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