Income Taxes	6 Months Ended
Aug. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Blocker, a wholly owned subsidiary of NGA, has elected to be taxed as a corporation. Accordingly, equity in the flow-through earnings of Eldorado and Mesquite, interest income from the Credit Agreement, and interest expense on intercompany borrowings received from Holdco to fund a portion of the Credit Agreement are taxed to Blocker. NGA recognizes interest income on intercompany loans to Blocker and incurs certain costs, primarily associated with being a public company, including professional and other fees, which, for tax purposes, flow through to its members. To recognize that realization of its deferred tax asset is not considered more likely than not, the Company has recorded a valuation allowance of 100% of its net deferred tax assets consisting primarily of impairment charges related to its investments in unconsolidated investees and the investees' investments. For these reasons, the Company’s effective tax rates for the periods presented are different than the statutory federal rate of 35%.

Income Taxes

6 Months Ended

Aug. 31, 2014

Blocker, a wholly owned subsidiary of NGA, has elected to be taxed as a corporation. Accordingly, equity in the flow-through earnings of Eldorado and Mesquite, interest income from the Credit Agreement, and interest expense on intercompany borrowings received from Holdco to fund a portion of the Credit Agreement are taxed to Blocker. NGA recognizes interest income on intercompany loans to Blocker and incurs certain costs, primarily associated with being a public company, including professional and other fees, which, for tax purposes, flow through to its members. To recognize that realization of its deferred tax asset is not considered more likely than not, the Company has recorded a valuation allowance of 100% of its net deferred tax assets consisting primarily of impairment charges related to its investments in unconsolidated investees and the investees' investments. For these reasons, the Company’s effective tax rates for the periods presented are different than the statutory federal rate of 35%.