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