Document Type Document Type Entity Listings, Exchange [Axis] Entity Listings, Exchange [Axis] City Area Code City Area Code Amendment Flag Amendment Flag Entity Address, State or Province Entity Address, State or Province Soliciting Material Soliciting Material Document Period End Date Document Period End Date Entity Tax Identification Number Entity Tax Identification Number Series D Preferred Units [Member] Series D Preferred Units [Member] Series D Preferred Units [Member] Pre-commencement Tender Offer Pre-commencement Tender Offer Entities [Table] Entities [Table] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Exchange [Domain] Exchange [Domain] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Series E Preferred Units [Member] Series E Preferred Units [Member] Series E Preferred Units [Member] Class of Stock [Domain] Class of Stock [Domain] NEW YORK STOCK EXCHANGE, INC. [Member] NEW YORK STOCK EXCHANGE, INC. [Member] Class of Stock [Axis] Class of Stock [Axis] Entity File Number Entity File Number Entity Central Index Key Entity Central Index Key Trading Symbol Trading Symbol Document and Entity Information [Abstract] Document and Entity Information [Abstract] Document and Entity Information [Abstract] Series C Preferred Units [Member] Series C Preferred Units [Member] Series C Preferred Units [Member] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Local Phone Number Local Phone Number Written Communications Written Communications Title of 12(b) Security Title of 12(b) Security Debt Instrument [Axis] Debt Instrument [Axis] Security Exchange Name Security Exchange Name Entity Address, City or Town Entity Address, City or Town Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Emerging Growth Company Entity Emerging Growth Company Entity Registrant Name Entity Registrant Name Entity Information [Line Items] Entity Information [Line Items]