Class of Stock [Domain] Indenture Offers Limited Protection Risk [Member] Indenture Offers Limited Protection Risk Active Trading Market Risk [Member] Active Trading Market Risk Indebtedness Risk [Member] Indebtedness Risk Unit [Member] Unit Change Of Control Repurchase Event Risk [Member] Change Of Control Repurchase Event Risk Warrant [Member] Structurally Subordinated To Indebtedness And Other Liabilities Risk [Member] Structurally Subordinated To Indebtedness And Other Liabilities Risk Credit Rating Risk [Member] Credit Rating Risk Common Stock [Member] Unsecured Notes Risk [Member] Unsecured Notes Risk Preferred Stock [Member] Optional Redemption Provision Risk [Member] Optional Redemption Provision Risk Subscription Rights [Member] Subscription Rights