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Net Income Per Common Share (Details) - shares | Dec. 31, 2017 | Dec. 31, 2016
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Earnings Per Share [Abstract] |  |
ESOP, number of suspense shares (in shares) | 51,105 | 84,964

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- Definition Shares contributed to the ESOP that have not yet been released, committed to be released, or allocated to participant accounts. Suspense shares generally collateralize ESOP debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65895303&loc=d3e17540-113929 + Details
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