Class of Stock [Axis] Document Type Document Annual Report Current Fiscal Year End Date Document Period End Date Document Fiscal Year Focus Document Transition Report Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company ICFR Auditor Attestation Flag Document Financial Statement Error Correction [Flag] Entity Shell Company Entity Public Float Entity Common Stock, Shares Outstanding Entity Central Index Key Amendment Flag Document Fiscal Period Focus Common Class A [Member] Common Class B [Member] Class of Stock [Domain] Entity Address, Postal Zip Code Document Type City Area Code Entity Current Reporting Status Entity Emerging Growth Company Entity Tax Identification Number Entity Small Business Entity File Number Entity Address, City or Town Entity Well-known Seasoned Issuer Amendment Flag Document Period End Date Entity Public Float Entity Interactive Data Current Title of 12(b) Security Common Class B [Member] Entity Voluntary Filers Entity Central Index Key Entity Filer Category Document Transition Report Document Financial Statement Error Correction [Flag] Document Annual Report Security Exchange Name Common Class A [Member] Document Fiscal Period Focus Current Fiscal Year End Date Entity Address, State or Province Trading Symbol Entity Shell Company Entity Common Stock, Shares Outstanding Entity Registrant Name ICFR Auditor Attestation Flag Entity Address, Address Line One Local Phone Number Entity Incorporation, State or Country Code Document Fiscal Year Focus