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Acquisitions Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 26, 2019 | Sep. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |
Common stock, shares outstanding (in shares) |  | 43,874,353 | 44,975,771 |
Acquisition of goodwill |  | $ 151,238 | $ 151,238 | $ 119,880
Salin |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Exchange ratio per share | 23907.50% |  |  |
Cash paid for shares (in USD per share) | $ 87,417.17 |  |  |
Common stock, shares outstanding (in shares) | 275,000 |  |  |
Common stock issued (in shares) | 6,563,697 |  |  |
Market closing price per share (in USD per share) | $ 15.65 |  |  |
Estimated transaction value | $ 126,700 |  |  |
Costs related to the acquisition | 5,600 |  |  |
Total purchase price | 126,722 |  |  |
Net intangible assets acquired | 19,818 |  |  |
Acquisition of goodwill | $ 31,358 |  |  |
Core deposit intangible amortization period |  | 10 years |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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