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Taxes - Permanent Differences Reconciliation (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
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Dec. 31, 2014
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| Income Tax Disclosure [Abstract] | ||
| Tax benefit of operating loss carryforwards | $ 49,447us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | $ 51,248us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
| Tax basis in excess of book basis | 121,340gte_DeferredTaxAssetsTaxBasisInExcessOfBookBasis | 108,120gte_DeferredTaxAssetsTaxBasisInExcessOfBookBasis |
| Foreign tax credits and other accruals | 19,179us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign | 20,369us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign |
| Tax benefit of capital loss carryforwards | 29,445us-gaap_DeferredTaxAssetsCapitalLossCarryforwards | 29,984us-gaap_DeferredTaxAssetsCapitalLossCarryforwards |
| Deferred tax assets before valuation allowance | 219,411us-gaap_DeferredTaxAssetsGross | 209,721us-gaap_DeferredTaxAssetsGross |
| Valuation allowance | (218,423)us-gaap_DeferredTaxAssetsValuationAllowance | (207,568)us-gaap_DeferredTaxAssetsValuationAllowance |
| Deferred tax assets, net | 988us-gaap_DeferredTaxAssetsNet | 2,153us-gaap_DeferredTaxAssetsNet |
| Deferred tax assets - current | 420us-gaap_DeferredTaxAssetsNetCurrent | 1,552us-gaap_DeferredTaxAssetsNetCurrent |
| Deferred tax assets - long-term | 568us-gaap_DeferredTaxAssetsNetNoncurrent | 601us-gaap_DeferredTaxAssetsNetNoncurrent |
| Deferred tax liabilities - current | (1,622)us-gaap_DeferredTaxLiabilitiesGrossCurrent | (1,040)us-gaap_DeferredTaxLiabilitiesGrossCurrent |
| Deferred tax liabilities - long-term | (158,932)us-gaap_DeferredTaxLiabilitiesGrossNoncurrent | (175,324)us-gaap_DeferredTaxLiabilitiesGrossNoncurrent |
| Deferred tax liabilities, net | (160,554)us-gaap_DeferredIncomeTaxLiabilities | (176,364)us-gaap_DeferredIncomeTaxLiabilities |
| Net Deferred Tax Liabilities | $ (159,566)us-gaap_DeferredTaxAssetsLiabilitiesNet | $ (174,211)us-gaap_DeferredTaxAssetsLiabilitiesNet |
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- Definition
The tax effect as of the balance sheet date of the amount of the estimated future tax reductions attributable to a difference between the tax basis and the generally accepted accounting principles basis of a company's investments which will decrease future taxable income when such basis difference reverses. No definition available.
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, before jurisdictional netting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences expected to be realized or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Gross amount of noncurrent deferred tax liabilities, which result from applying the applicable tax rate to taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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