Common Stock-Par Value $0.01 per share Common Stock [Member] Series L Preferred Stock Series L Preferred Stock [Member] Series L Preferred Stock Entity Tax Identification Number Entity Tax Identification Number Entity File Number Entity File Number Cover [Abstract] Cover [Abstract] Title of 12(b) Security Title of 12(b) Security Entities [Table] Entities [Table] Class of Stock [Domain] Class of Stock [Domain] Local Phone Number Local Phone Number Series I Preferred Stock Series I Preferred Stock [Member] Series I Preferred Stock Soliciting Material Soliciting Material Entity Address, Address Line One Entity Address, Address Line One Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Series H Preferred Stock Series H Preferred Stock [Member] Entity Address, State or Province Entity Address, State or Province Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Series J preferred stock [Domain] Series J preferred stock [Member] Series J preferred stock Entity Information [Line Items] Entity Information [Line Items] Written Communications Written Communications Trading Symbol Trading Symbol Amendment Description Amendment Description City Area Code City Area Code Document Information [Table] Document Information [Table] Document Period End Date Document Period End Date Amendment Flag Amendment Flag Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Address, City or Town Entity Address, City or Town Document [Domain] Document [Domain] Security Exchange Name Security Exchange Name Document Information, Document [Axis] Document Information, Document [Axis] Document Information [Line Items] Document Information [Line Items] Class of Stock [Axis] Class of Stock [Axis] Document Type Document Type Pre-commencement Tender Offer Pre-commencement Tender Offer Entity Central Index Key Entity Central Index Key Entity Emerging Growth Company Entity Emerging Growth Company