| Component: (Network and Table) | |
|---|---|
| Network | 152 - Disclosure - Reconciliation of Income Taxes Computed at United States Federal Statutory Tax Rate to Income Tax Provision (Benefit) (Detail) (http://www.alliednevada.com/taxonomy/role/DisclosureReconciliationOfIncomeTaxesComputedAtUnitedStatesFederalStatutoryTaxRateToIncomeTaxProvisionBenefit) |
| Table | Reconciliation Of Income Taxes [Table] |
| Reporting Entity [Axis] | 0001376610 (http://www.sec.gov/CIK) |
| Legal Entity [Axis] | Entity [Domain] |
| Reconciliation Of Income Taxes [Line Items] | Period [Axis] | |||
|---|---|---|---|---|
2012-01-01 - 2012-12-31 | 2012-01-01 - 2012-09-30 | 2011-01-01 - 2011-12-31 | 2010-01-01 - 2010-12-31 | |
Income taxed at statutory rates, amount | 22,452,000 | 15,071,000 | 9,456,000 | |
Percentage depletion, amount | (6,933,000) | 3,000,000 | (7,688,000) | (3,672,000) |
Basis adjustment, amount | (1,077,000) | |||
Change in valuation allowance, amount | (264,000) | (11,466,000) | ||
Other, amount | 1,168,000 | 43,000 | (1,430,000) | |
Income tax provision (benefit) | 16,423,000 | 6,349,000 | (7,112,000) | |
Income taxed at statutory rates, percentage of pretax income | .3500 | .3500 | .3500 | |
Percentage depletion, percentage of pretax income | (.1082) | (.1785) | (.1359) | |
Basis adjustment, percentage of pretax income | (.0250) | |||
Change in valuation allowance, percentage of pretax income | (.0041) | (.4244) | ||
Other, percentage of pretax income | .0183 | .0010 | (.0529) | |
Income tax provision (benefit) | .2560 | .1475 | (.2633) | |