Class of Stock [Domain] Class of Stock [Domain] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entities [Table] Entities [Table] Series A Preferred Stock [Member] Series A Preferred Stock [Member] Class of Stock [Axis] Class of Stock [Axis] Security Exchange Name Security Exchange Name Entity Address, City or Town Entity Address, City or Town Soliciting Material Soliciting Material Cover page. Cover [Abstract] City Area Code City Area Code Amendment Flag Amendment Flag Entity Tax Identification Number Entity Tax Identification Number Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Pre-commencement Tender Offer Pre-commencement Tender Offer Entity Emerging Growth Company Entity Emerging Growth Company Entity Central Index Key Entity Central Index Key Entity File Number Entity File Number Entity Address, State or Province Entity Address, State or Province Class A common stock Common Class A [Member] Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Series B Preferred Stock Series B Preferred Stock [Member] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Postal Zip Code Entity Address, Postal Zip Code Written Communications Written Communications Entity Address, Address Line Two Entity Address, Address Line Two Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Document Period End Date Document Period End Date Entity Information [Line Items] Entity Information [Line Items] 6.75% Series B mandatory convertible preferred stock, par value $0.01 per share 6.75% Series B mandatory convertible preferred stock, par value $0.01 per share [Member] 6.75% Series B mandatory convertible preferred stock, par value $0.01 per share Document Type Document Type