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Note 8 - Shareholders' Equity - Changes in Shareholders' Equity (Details) (Parentheticals) | 3 Months Ended
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Mar. 31, 2018 $ / shares
Cash dividends paid, per share (in dollars per share) | $ 0.37
Parent [Member] |
Cash dividends paid, per share (in dollars per share) |
Noncontrolling Interest [Member] |
Cash dividends paid, per share (in dollars per share) |

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Details
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