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Consolidated Statements of Shareholders' Equity (Parenthetical) | 12 Months Ended
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Dec. 31, 2017 $ / shares shares | Dec. 31, 2016 $ / shares shares | Dec. 31, 2015 $ / shares shares
Cash dividends paid on common shares, per share | $ / shares | $ 0.44 | $ 0.4100 | $ 0.26
Issuance under equity compensation plans, shares | 174,895 | 213,234 | 179,600
Stock Issued During Period, Shares, Conversion of Convertible Securities | 0 | 0 | 0
Total shares awarded to JCB shareholders |  | 0 | 0

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