Indenture will contain limited protection for holders of the Notes [Member] Indenture will contain limited protection for holders of the Notes Indebtedness Could Adversely Affect Business [Member] Indebtedness Could Adversely Affect Business Corporate-Level Taxes Could Adversely Affect Cash Flow [Member] Corporate-Level Taxes Could Adversely Affect Cash Flow May Redeem Notes When Interest Rates are Low [Member] May Redeem Notes When Interest Rates are Low Deed of trust contains various covenants which could affect liquidity [Member] Deed of trust contains various covenants which could affect liquidity Downgrade, Suspension or Withdrawal of Rating by Rating Agency [Member] Downgrade, Suspension or Withdrawal of Rating by Rating Agency Notes Subordinated to Existing and Future Indebtedness and Liabilities of Subsidiaries [Member] Notes Subordinated to Existing and Future Indebtedness and Liabilities of Subsidiaries Restructuring transactions may not constitute change of control [Member] Restructuring transactions may not constitute change of control NAV Calculation may be Higher or Lower [Member] NAV Calculation may be Higher or Lower Increase in Market Interest Rates [Member] Increase in Market Interest Rates Trading Market for Notes not Assured [Member] Trading Market for Notes not Assured Provisions of the Notes could discourage an acquisition of us by a third party [Member] Provisions of the Notes could discourage an acquisition of us by a third party Indentures Will Contain Limited Protection [Member] Indentures Will Contain Limited Protection Unable to repurchase upon change of control [Member] Unable to repurchase upon change of control