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Consolidated statements of changes in shareholders' equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016
Statement Of Stockholders Equity [Abstract] |  |
Cash dividends paid, per share |  | $ 0.54
Fair Value Election on Mortgage Servicing Rights Retained Earnings Adjustment, Tax | $ 396 |

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- Definition Fair value election on mortgage servicing rights retained earnings adjustment, tax. + References No definition available. + Details
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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 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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