Common Stock Common Stock [Member] Series E Preferred Stock Series E Preferred Stock [Member] Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line Two Entity Address, Address Line Two Entity File Number Entity File Number Cover [Abstract] Title of 12(b) Security Title of 12(b) Security Class of Stock [Domain] Class of Stock [Domain] Local Phone Number Local Phone Number Soliciting Material Soliciting Material Entity Address, Address Line One Entity Address, Address Line One Entity Address, Postal Zip Code Entity Address, Postal Zip Code Registrant Name Entity Registrant Name Entity Address, State or Province Entity Address, State or Province Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Series C Preferred Stock Series C Preferred Stock [Member] Written Communications Written Communications Trading Symbol Trading Symbol City Area Code City Area Code 6.20% Senior Notes due 2026 6.20% Senior Notes due 2026 [Member] Represents the information pertaining to 6.20% Senior Notes due 2026. 5.75% Senior Notes Due 2026 5.75% Senior Notes Due 2026 [Member] Represents the information pertaining to the 5.75% Senior Notes die in 2026. Document Information [Table] Document Information [Table] Document Period End Date Document Period End Date Amendment Flag Amendment Flag Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Address, City or Town Entity Address, City or Town Security Exchange Name Security Exchange Name Document Information [Line Items] Document Information [Line Items] Class of Stock [Axis] Class of Stock [Axis] Document Type Document Type 9.00% Senior Notes Due 2026 9.00% Senior Notes Due 2026 [Member] 9.00% Senior Notes Due 2026 Pre-commencement Tender Offer Pre-commencement Tender Offer Central Index Key Entity Central Index Key Entity Emerging Growth Company Entity Emerging Growth Company