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Investment Securities - Carrying value of other investment securities (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Other investment securities |  |
Carrying Value | $ 160,592 | $ 160,443
Impairment on other investment securities | 0 |
Federal Home Loan Bank stock |  |
Other investment securities |  |
Carrying Value | 16,283 | 15,083
Federal Reserve Bank Stock |  |
Other investment securities |  |
Carrying Value | 129,716 | 129,871
Investment in unconsolidated subsidiaries |  |
Other investment securities |  |
Carrying Value | 3,563 | 4,941
Other nonmarketable investment securities |  |
Other investment securities |  |
Carrying Value | $ 11,030 | $ 10,548

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- Definition The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI http://asc.fasb.org/extlink&oid=124260329&loc=SL6284422-111562 + Details
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