Label	Element	Value
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation	$ 1,009,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	147,335,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	217,643,000
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2,532,000
Treasury Stock, Value, Acquired, Cost Method	us-gaap_TreasuryStockValueAcquiredCostMethod	0
AOCI Attributable to Parent [Member]
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	2,913,000
Treasury Stock [Member]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation	661,000
Treasury Stock, Value, Acquired, Cost Method	us-gaap_TreasuryStockValueAcquiredCostMethod	0
Additional Paid-in Capital [Member]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation	(348,000)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2,532,000
Retained Earnings [Member]
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	37,291,000
Common Class B [Member]
Dividends, Common Stock, Cash	us-gaap_DividendsCommonStockCash	$ 779,000
Common Class B [Member] | Retained Earnings [Member]
Common Stock, Dividends, Per Share, Declared	us-gaap_CommonStockDividendsPerShareDeclared	$ 0.2200
Dividends, Common Stock, Cash	us-gaap_DividendsCommonStockCash	$ 779,000
Nonvoting Common Stock [Member]
Dividends, Common Stock, Cash	us-gaap_DividendsCommonStockCash	$ 10,675,000
Nonvoting Common Stock [Member] | Retained Earnings [Member]
Common Stock, Dividends, Per Share, Declared	us-gaap_CommonStockDividendsPerShareDeclared	$ 0.2200
Dividends, Common Stock, Cash	us-gaap_DividendsCommonStockCash	$ 10,675,000