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