Cover page. Entity Emerging Growth Company Entity Emerging Growth Company Amendment Flag Amendment Flag Entity Registrant Name Entity Registrant Name City Area Code City Area Code Entity Address, Address Line One Entity Address, Address Line One Entity Central Index Key Entity Central Index Key Document Type Document Type Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Document Period End Date Document Period End Date Soliciting Material Soliciting Material Written Communications Written Communications Entity File Number Entity File Number Entity Tax Identification Number Entity Tax Identification Number Entity Address, City or Town Entity Address, City or Town Pre-commencement Tender Offer Pre-commencement Tender Offer Entity Address, State or Province Entity Address, State or Province Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series G Preferred Stock, Depository Share [Member] Series G Preferred Stock, Depository Share [Member] Series G Preferred Stock, Depository Share [Member] Series D Preferred Stock, Depository Share [Member] Series D Preferred Stock, Depository Share [Member] Series D Preferred Stock, Depository Share [Member] Series C Preferred Stock, Depository Share [Member] Series C Preferred Stock, Depository Share [Member] Series C Preferred Stock, Depository Share [Member] Common Stock [Member] Common Stock [Member] Class of Stock [Line Items] Class of Stock [Line Items] Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name