Soliciting Material Soliciting Material Written Communications Written Communications Document [Domain] Document [Domain] Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Document and Entity Information [Line Items] Document Information [Line Items] Amendment Flag Amendment Flag Entity Emerging Growth Company Entity Emerging Growth Company Series E Preferred Stock [Member] Series E Preferred Stock [Member] Entity File Number Entity File Number Security Exchange Name Security Exchange Name Series I Preferred Stock Series I Preferred Stock [Member] Series I Preferred Stock 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 Document Period End Date Document Period End Date Document Information [Table] Document Information [Table] Series D Preferred Stock [Member] Series D Preferred Stock [Member] 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 Entity Registrant Name Entity Registrant Name Trading Symbol Trading Symbol Document and Entity Information [Abstract] Document and Entity Information [Abstract] Document and Entity Information [Abstract] Common Stock [Member] 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