Written Communications Written Communications Soliciting Material Soliciting Material Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Document Information [Line Items] Document Information [Line Items] Amendment Flag Amendment Flag Entity Emerging Growth Company Entity Emerging Growth Company Securities Act File Number Securities Act File Number Security Exchange Name Security Exchange Name 5.35% Series A Fixed Rate Cumulative Perpetual Preferred Stock 5.35% Series A Fixed Rate Cumulative Perpetual Preferred Stock [Member] 5.35% Series A Fixed Rate Cumulative Perpetual Preferred Stock Entity Address, State or Province Entity Address, State or Province Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two City Area Code City Area Code Cover [Abstract] 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 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 Common Stock 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