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Consolidated Statements of Stockholders' Equity (Parentheticals) (USD $) | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Statement of Stockholders' Equity (Parentheticals) |  |
Cash dividends paid per share | $ 0.22us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.215us-gaap_CommonStockDividendsPerShareCashPaid
Treasury shares sold | 50us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued | 55us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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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- Definition Number of treasury shares (units) reissued during the period, excluding reissuance of shares (units) held in treasury used to satisfy equity-based compensation obligations exercised by the holders of such rights. Upon reissuance of shares (units) from treasury, either the common or preferred stock (unit) reissued is outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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