Income Taxes	6 Months Ended
Jun. 30, 2012
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The computation of the Company's annual effective tax rate includes a forecast of the Company's estimated “ordinary” income (loss), which is its annual income (loss) from continuing operations before tax, excluding unusual or infrequently occurring (discrete) items. Significant management judgment is required in projecting the Company's ordinary income (loss). The Company's projected ordinary income tax expense for the full year 2012 consists primarily of the deferred tax effect of the Company's investments in joint ventures that are in a deferred tax liability position and the amortization of wireless licenses for income tax purposes. Because the Company's projected 2012 income tax expense is a relatively fixed amount, a small change in the ordinary income (loss) projection can produce a significant variance in the effective tax rate, therefore making it difficult to determine a reliable estimate of the annual effective tax rate. As a result, and in accordance with the authoritative guidance for accounting for income taxes in interim periods, the Company has computed its provision for income taxes as of and for the three and six months ended June 30, 2012 and 2011 by applying the actual effective tax rate to the year-to-date income (loss). The Company periodically assesses the likelihood that its deferred tax assets will be recoverable from future taxable income. Deferred tax liabilities associated with wireless licenses and investments in certain joint ventures cannot be considered a source of taxable income to support the realization of deferred tax assets because these deferred tax liabilities will not reverse until some indefinite future period when these assets are either sold or impaired for book purposes. To the extent the Company believes it is more likely than not that its deferred tax assets will not be recovered, it must establish a valuation allowance. As part of this periodic assessment for the three and six months ended June 30, 2012, the Company weighed the positive and negative factors and, at this time, does not believe there is sufficient positive evidence to support a conclusion that it is more likely than not that all or a portion of its deferred tax assets will be realized, except with respect to the realization of a $1.9 million Texas Margins Tax (“TMT”) credit. Accordingly, at June 30, 2012 and December 31, 2011, the Company recorded a valuation allowance offsetting substantially all of its deferred tax assets. The Company has substantial federal and state net operating losses ("NOLs") for income tax purposes. Subject to certain requirements, the Company may “carry forward” its federal NOLs for up to 20 years to offset future taxable income and reduce its income tax liability. For state income tax purposes, the NOL carryforward period ranges from five to 20 years. As of June 30, 2012, the Company had federal and state NOLs of approximately $2.6 billion which begin to expire in 2022 for federal income tax purposes and of which $37.2 million will expire at the end of 2012 for state income tax purposes. While these NOL carryforwards have a potential to be used to offset future ordinary taxable income and reduce future cash tax liabilities by approximately $991.4 million, the Company's ability to utilize these NOLs will depend upon the availability of future taxable income during the carryforward period and, as such, there is no assurance the Company will be able to realize such tax savings. The Company's ability to utilize NOLs could be further limited if it were to experience an “ownership change,” as defined in Section 382 of the Internal Revenue Code and similar state provisions. In general terms, an ownership change can occur whenever there is a cumulative shift in the ownership of a company by more than 50 percentage points by one or more “5% stockholders” within a three-year period. The occurrence of such a change generally limits the amount of NOL carryforwards a company could utilize in a given year to the aggregate fair market value of the company's common stock immediately prior to the ownership change, multiplied by the long-term tax-exempt interest rate in effect for the month of the ownership change. The determination of whether an ownership change has occurred for purposes of Section 382 is complex and requires significant judgment. The occurrence of such an ownership change would accelerate cash tax payments the Company would be required to make and likely result in a substantial portion of its NOLs expiring before the Company could fully utilize them. On August 30, 2011, the Company’s board of directors adopted a Tax Benefit Preservation Plan to help deter acquisitions of Leap common stock that could result in an ownership change under Section 382 and thus help preserve the Company’s ability to use its NOL carryforwards. The Tax Benefit Preservation Plan was approved by the Company's stockholders in May 2012. The Tax Benefit Preservation Plan is designed to deter acquisitions of Leap common stock that would result in a stockholder owning 4.99% or more of Leap common stock (as calculated under Section 382), or any existing holder of 4.99% or more of Leap common stock acquiring additional shares, by substantially diluting the ownership interest of any such stockholder unless the stockholder obtains an exemption from the Company’s board of directors. The Company's unrecognized income tax benefits and uncertain tax positions, as well as any associated interest and penalties, are recorded through income tax expense; however, such amounts have not been significant in any period.

Income Taxes

The computation of the Company's annual effective tax rate includes a forecast of the Company's estimated “ordinary” income (loss), which is its annual income (loss) from continuing operations before tax, excluding unusual or infrequently occurring (discrete) items. Significant management judgment is required in projecting the Company's ordinary income (loss). The Company's projected ordinary income tax expense for the full year 2012 consists primarily of the deferred tax effect of the Company's investments in joint ventures that are in a deferred tax liability position and the amortization of wireless licenses for income tax purposes. Because the Company's projected 2012 income tax expense is a relatively fixed amount, a small change in the ordinary income (loss) projection can produce a significant variance in the effective tax rate, therefore making it difficult to determine a reliable estimate of the annual effective tax rate. As a result, and in accordance with the authoritative guidance for accounting for income taxes in interim periods, the Company has computed its provision for income taxes as of and for the three and six months ended June 30, 2012 and 2011 by applying the actual effective tax rate to the year-to-date income (loss).

The Company periodically assesses the likelihood that its deferred tax assets will be recoverable from future taxable income. Deferred tax liabilities associated with wireless licenses and investments in certain joint ventures cannot be considered a source of taxable income to support the realization of deferred tax assets because these deferred tax liabilities will not reverse until some indefinite future period when these assets are either sold or impaired for book purposes. To the extent the Company believes it is more likely than not that its deferred tax assets will not be recovered, it must establish a valuation allowance. As part of this periodic assessment for the three and six months ended June 30, 2012, the Company weighed the positive and negative factors and, at this time, does not believe there is sufficient positive evidence to support a conclusion that it is more likely than not that all or a portion of its deferred tax assets will be realized, except with respect to the realization of a $1.9 million Texas Margins Tax (“TMT”) credit. Accordingly, at June 30, 2012 and December 31, 2011, the Company recorded a valuation allowance offsetting substantially all of its deferred tax assets.

The Company has substantial federal and state net operating losses ("NOLs") for income tax purposes. Subject to certain requirements, the Company may “carry forward” its federal NOLs for up to 20 years to offset future taxable income and reduce its income tax liability. For state income tax purposes, the NOL carryforward period ranges from five to 20 years. As of June 30, 2012, the Company had federal and state NOLs of approximately $2.6 billion which begin to expire in 2022 for federal income tax purposes and of which $37.2 million will expire at the end of 2012 for state income tax purposes. While these NOL carryforwards have a potential to be used to offset future ordinary taxable income and reduce future cash tax liabilities by approximately $991.4 million, the Company's ability to utilize these NOLs will depend upon the availability of future taxable income during the carryforward period and, as such, there is no assurance the Company will be able to realize such tax savings.

The Company's ability to utilize NOLs could be further limited if it were to experience an “ownership change,” as defined in Section 382 of the Internal Revenue Code and similar state provisions. In general terms, an ownership change can occur whenever there is a cumulative shift in the ownership of a company by more than 50 percentage points by one or more “5% stockholders” within a three-year period. The occurrence of such a change generally limits the amount of NOL carryforwards a company could utilize in a given year to the aggregate fair market value of the company's common stock immediately prior to the ownership change, multiplied by the long-term tax-exempt interest rate in effect for the month of the ownership change.

The determination of whether an ownership change has occurred for purposes of Section 382 is complex and requires significant judgment. The occurrence of such an ownership change would accelerate cash tax payments the Company would be required to make and likely result in a substantial portion of its NOLs expiring before the Company could fully utilize them.

On August 30, 2011, the Company’s board of directors adopted a Tax Benefit Preservation Plan to help deter acquisitions of Leap common stock that could result in an ownership change under Section 382 and thus help preserve the Company’s ability to use its NOL carryforwards. The Tax Benefit Preservation Plan was approved by the Company's stockholders in May 2012. The Tax Benefit Preservation Plan is designed to deter acquisitions of Leap common stock that would result in a stockholder owning 4.99% or more of Leap common stock (as calculated under Section 382), or any existing holder of 4.99% or more of Leap common stock acquiring additional shares, by substantially diluting the ownership interest of any such stockholder unless the stockholder obtains an exemption from the Company’s board of directors.

The Company's unrecognized income tax benefits and uncertain tax positions, as well as any associated interest and penalties, are recorded through income tax expense; however, such amounts have not been significant in any period.