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Business Combinations - Schedule of Pro Forma Information on Acquisition (Details) - ColoEast Bankshares, Inc. - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items] |  |  |  |
Net interest income | $ 32,792 | $ 29,941 | $ 94,778 | $ 87,443
Noninterest income | 6,131 | 7,098 | 16,463 | 28,507
Net income | $ 4,677 | $ 6,809 | $ 14,959 | $ 25,740
Basic earnings per common share | $ 0.25 | $ 0.37 | $ 0.80 | $ 1.42
Diluted earnings per common share | $ 0.24 | $ 0.37 | $ 0.79 | $ 1.39

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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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