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Investment Securities Available for Sale, at Fair Value - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Accrued interest receivable | $ 38,136,000 |  | $ 38,136,000 |  | $ 26,688,000
Unrealized gains (losses) on investments | 1,500,000 | $ 8,000,000 | 3,100,000 | $ 6,100,000 |
Sales Proceeds | 0 | 3,770,000 | $ 24,374,000 | 115,398,000 |
Contractual maturities (up to) |  |  | 37 years |  |
Weighted average life of available for sale securities portfolio |  |  | 6 years |  | 5 years 9 months 18 days
Allowance for credit loss | 0 |  | $ 0 |  | $ 0
Debt securities, allowance for credit loss, period increase (decrease) | 0 | $ 0 | 0 | $ 0 |
Available-for-sale Securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Accrued interest receivable | $ 400,000 |  | $ 400,000 |  | $ 700,000

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- Definition Contractual maturities of investments. + References No definition available. + Details
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- Definition Proceeds Including Receivable For Unsettled Trades From Sale of Debt Securities, Available-for-sale + References No definition available. + Details
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- Definition Amount of increase (decrease) in allowance for credit loss 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 + Details
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- Definition Amount excluding accrued interest, of allowance for credit loss on 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 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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- Definition Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(a)(4)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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