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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parentheticals) - $ / shares |  |  |  | 3 Months Ended | 12 Months Ended
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Nov. 08, 2016 | Nov. 10, 2015 | Dec. 05, 2014 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Cash dividends declared per common share (in dollars per share) |  |  |  | $ 0.41 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.50 | $ 0.24 | $ 0.24 | $ 0.24 | $ 1.16 | $ 1.22 | $ 1.23
Special Cash Dividend [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared per common share (in dollars per share) | $ 0.15 | $ 0.25 | $ 0.30 |  |  |  |  |  |  |  |  |  |  |

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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 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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