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Note 17 - Guarantor Subsidiaries (Details) - Condensed Consolidating Statements of Operations (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Condensed Income Statements, Captions [Line Items] |  |  |
Revenues | $ 382,589 | $ 321,143 | $ 477,634
Cost of sales | (235,316) | (134,105) | (165,573)
Depreciation, depletion, amortization | (81,127) | (43,522) | (47,066)
General and administrative | (28,925) | (21,253) | (18,540)
Loss on derivative contracts | 17,979 | (10,457) | 37,988
Aurizon acquisition costs | (26,397) |  |
Income (loss) before income taxes | (34,925) | 23,833 | 233,142
(Provision) benefit from income taxes | 9,795 | (8,879) | (81,978)
Net income (loss) | (25,130) | 14,954 | 151,164
Comprehensive income (loss) | (27,511) | 14,534 | 142,783
Preferred stock dividends | (552) | (552) | (552)
Income (loss) applicable to common stockholders | (25,682) | 14,402 | 150,612
Parent [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Revenues | 3,044 | (1,346) | 7,140
General and administrative | (14,441) | (11,519) | (10,355)
Exploration and pre-development | (576) | (1,262) | (407)
Gain on derivative contracts |  |  | 37,988
Loss on derivative contracts | 17,979 | (10,457) |
Aurizon acquisition costs | (14,444) |  |
Equity in earnings of subsidiaries | (15,807) | 21,246 | 254,902
Other (expense) income | (885) | 18,292 | (138,104)
Income (loss) before income taxes | (25,130) | 14,954 | 151,164
Net income (loss) | (25,130) | 14,954 | 151,164
Changes in comprehensive income (loss) | (2,381) | (420) | (8,381)
Comprehensive income (loss) | (27,511) | 14,534 | 142,783
Preferred stock dividends | (552) | (552) | (552)
Income (loss) applicable to common stockholders | (25,682) | 14,402 | 150,612
Guarantor Subsidiaries [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Revenues | 304,423 | 322,489 | 470,494
Cost of sales | (179,491) | (134,105) | (165,573)
Depreciation, depletion, amortization | (63,097) | (43,522) | (47,066)
General and administrative | (13,174) | (9,519) | (7,909)
Exploration and pre-development | (24,990) | (38,700) | (23,548)
Closed operations |  | (2,259) | (8,961)
Other (expense) income | 1,345 | (27,747) | 4,920
Income (loss) before income taxes | 25,016 | 66,637 | 222,357
(Provision) benefit from income taxes | (14,171) | (29,802) | 44,448
Net income (loss) | 10,845 | 36,835 | 266,805
Changes in comprehensive income (loss) | (7) | (911) | (3,089)
Comprehensive income (loss) | 10,838 | 35,924 | 263,716
Income (loss) applicable to common stockholders | 10,845 | 36,835 | 266,805
Non-Guarantor Subsidiaries [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Revenues | 75,122 |  |
Cost of sales | (55,825) |  |
Depreciation, depletion, amortization | (18,030) |  |
General and administrative | (1,310) | (215) | (276)
Exploration and pre-development | (12,084) | (9,776) | (7,450)
Closed operations |  | (2,393) | (786)
Aurizon acquisition costs | (11,953) |  |
Other (expense) income | (9,616) | (3,207) | (3,391)
Income (loss) before income taxes | (33,696) | (15,591) | (11,903)
(Provision) benefit from income taxes | 7,044 |  |
Net income (loss) | (26,652) | (15,591) | (11,903)
Changes in comprehensive income (loss) | (4,587) | 1,438 | (679)
Comprehensive income (loss) | (31,239) | (14,153) | (12,582)
Income (loss) applicable to common stockholders | (26,652) | (15,591) | (11,903)
Consolidation, Eliminations [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Equity in earnings of subsidiaries | 15,807 | (21,246) | (254,902)
Other (expense) income | (16,922) | (20,921) | 126,426
Income (loss) before income taxes | (1,115) | (42,167) | (128,476)
(Provision) benefit from income taxes | 16,922 | 20,923 | (126,426)
Net income (loss) | 15,807 | (21,244) | (254,902)
Changes in comprehensive income (loss) | 4,594 | (527) | 3,768
Comprehensive income (loss) | 20,401 | (21,771) | (251,134)
Income (loss) applicable to common stockholders | 15,807 | (21,244) | (254,902)
Consolidated [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Revenues | 382,589 | 321,143 | 477,634
Cost of sales | (235,316) | (134,105) | (165,573)
Depreciation, depletion, amortization | (81,127) | (43,522) | (47,066)
General and administrative | (28,925) | (21,253) | (18,540)
Exploration and pre-development | (37,650) | (49,738) | (31,405)
Gain on derivative contracts |  |  | 37,988
Loss on derivative contracts | 17,979 | (10,457) |
Closed operations |  | (4,652) | (9,747)
Aurizon acquisition costs | (26,397) |  |
Other (expense) income | (26,078) | (33,583) | (10,149)
Income (loss) before income taxes | (34,925) | 23,833 | 233,142
(Provision) benefit from income taxes | 9,795 | (8,879) | (81,978)
Net income (loss) | (25,130) | 14,954 | 151,164
Changes in comprehensive income (loss) | (2,381) | (420) | (8,381)
Comprehensive income (loss) | (27,511) | 14,534 | 142,783
Preferred stock dividends | (552) | (552) | (552)
Income (loss) applicable to common stockholders | $ (25,682) | $ 14,402 | $ 150,612

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 + Details
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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Comprehensive Income -URI http://asc.fasb.org/extlink&oid=16317811 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e557-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 + Details
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- Definition Total costs related to goods produced and sold during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Depreciation of property, plant and equipment directly related to goods produced and sold during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of gross profit attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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- Definition Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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- Definition Exploration expenses (including prospecting) related to the mining industry would be included in operating expenses. Exploration costs include costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of mineral reserves. + References No definition available. + Details
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- Definition The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings. + 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 (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + 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 (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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