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