cm:Concept: us-gaap:IncomeTaxReconciliationNondeductibleExpenseDepletion
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depletion, Amount |
us-gaap:IncomeTaxReconciliationNondeductibleExpenseDepletion |
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible depletion. |
cm:Concept |
Monetary (xbrli:monetaryItemType) |
For Period (duration) |
Debit |
false |
us-gaap:IncomeTaxReconciliationNondeductibleExpenseDepletion |