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