Label	Element	Value
Common Class A [Member]
CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 0
Retained Earnings [Member]
CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	4,578,000
Additional Paid In Capital [Member]
CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	534,000
Common Class B [Member]
CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 0