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Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Cash dividends declared |  |  |  |  |  |  |  |  |  |  |
Common stock, dividend per share | $ 0.26 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.26 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.26 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.23 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.23 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.23 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.23 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.2 us-gaap_CommonStockDividendsPerShareDeclared | $ 1.01 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.89 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.8 us-gaap_CommonStockDividendsPerShareDeclared

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- Definition Aggregate dividends declared 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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- Details
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