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Note 12 - Stockholders' Equity and Earnings Per Share (Details Textual) $ in Millions | Dec. 31, 2018 USD ($)
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Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval | $ 189

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- Definition Amount of dividends that can be declared or paid with approval of regulatory agency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithRegulatoryApproval
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant