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Condensed Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($) | Jun. 30, 2021 | Dec. 31, 2020
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Statement of Financial Position [Abstract] |  |
Amortized cost | $ 1,029,001,000 | $ 770,195,000
Preferred Stock, No Par Value | $ 0 | $ 0
Preferred stock, shares authorized (in shares) | 2,500,000 | 2,500,000
Preferred Stock, Value, Outstanding | $ 0 | $ 0
Common stock, no par value (in usd per share) | $ 0 | $ 0
Common stock, shares authorized (in shares) | 50,000,000 | 50,000,000
Common stock, shares issued (in shares) | 36,006,560 | 35,912,243
Common stock, shares outstanding (in shares) | 36,006,560 | 35,912,243

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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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