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Acquisition of The Scottdale Bank and Trust Company (Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net interest income after loan loss provision | $ 26,289 | $ 20,308 | $ 20,296 | $ 17,115 | $ 17,070 | $ 17,202 | $ 17,305 | $ 17,181 | $ 84,008 | $ 68,758 | $ 55,434 |
Noninterest income | 6,050 | 5,302 | 3,622 | 2,934 | 4,695 | 3,003 | 2,874 | 2,049 | 17,908 | 12,621 | 7,462 |
Noninterest expense | $ 21,419 | $ 18,174 | $ 15,403 | $ 15,581 | $ 16,171 | $ 14,683 | $ 14,796 | $ 14,303 | $ 70,577 | $ 59,953 | 50,171 |
Scottdale Bank and Trust Company [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net interest income after loan loss provision |  |  |  |  |  |  |  |  |  |  | 55,434 | $ 43,371
Noninterest income |  |  |  |  |  |  |  |  |  |  | 7,462 | 6,094
Noninterest expense |  |  |  |  |  |  |  |  |  |  | 48,867 | 38,403
Net income |  |  |  |  |  |  |  |  |  |  | $ 11,736 | $ 8,075
Net income per common share |  |  |  |  |  |  |  |  |  |  | $ 1.64 | $ 1.32

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition The pro forma net Income or Loss for the 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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