Soliciting Material Soliciting Material Written Communications Written Communications Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] 7.125% Series B Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock Seven Point One Two Five Percent Series B Fixed-To-Floating Rate Cumulative Redeemable Preferred Stock [Member] Seven Point One Two Five Percent Series B Fixed-To-Floating Rate Cumulative Redeemable Preferred Stock Amendment Flag Amendment Flag Entity Emerging Growth Company Entity Emerging Growth Company Entity File Number Entity File Number Security Exchange Name Security Exchange Name 6.375% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock Six Point Three Seven Five Percent Series C Fixed Rate Reset Cumulative Redeemable Preferred Stock [Member] Six Point Three Seven Five Percent Series C Fixed Rate Reset Cumulative Redeemable Preferred Stock 7.50% Series A Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock Seven Point Five Percent Series A Fixed-To-Floating Rate Cumulative Redeemable Preferred Stock [Member] Seven Point Five Percent Series A Fixed-To-Floating Rate Cumulative Redeemable Preferred Stock Entity Address, State or Province Entity Address, State or Province Entity Address, Address Line One Entity Address, Address Line One Eight Point Seven Five Percent Series F Fixed-Rate Reset Cumulative Redeemable Preferred Stock Eight Point Seven Five Percent Series F Fixed-Rate Reset Cumulative Redeemable Preferred Stock [Member] Eight Point Seven Five Percent Series F Fixed-Rate Reset Cumulative Redeemable Preferred Stock 7.00% Series D Fixed Rate Reset Cumulative Redeemable Preferred Stock Seven Percent Fixed Rate Reset Series D Cumulative Redeemable Preferred [Member] Seven Percent Fixed Rate Reset Series D Cumulative Redeemable Preferred Stock City Area Code City Area Code Cover [Abstract] Entity Information [Line Items] Entity Information [Line Items] Document Period End Date Document Period End Date 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 Entities [Table] Entities [Table] Entity Registrant Name Entity Registrant Name Trading Symbol Trading Symbol 8.750% Series E Fixed Rate Cumulative Redeemable Preferred Stock Eight Point Seven Five Percent Series E Fixed Rate Cumulative Redeemable Preferred Stock [Member] Eight Point Seven Five Percent Series E Fixed Rate Cumulative Redeemable Preferred Stock Common Stock, $0.01 par value 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, City or Town Entity Address, City or Town Entity Address, Postal Zip Code Entity Address, Postal Zip Code Document Type Document Type