Investment in Securities (Narrative) (Details) - USD ($) |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Dec. 31, 2020 |
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| Securities, Available-for-sale [Line Items] | |||||
| Debt Securities, Available-for-sale, Allowance for Credit Loss | $ 19,200,000 | $ 19,200,000 | $ 24,900,000 | ||
| Debt Securities, Available-for-sale, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 2,600,000 | ||||
| Available-for-sale securities Realizes Losses - Write offs | (300,000) | $ (2,500,000) | (1,500,000) | $ (16,300,000) | |
| Catch-up premium amortization adjustment | (2,900,000) | 300,000 | 10,000 | (4,400,000) | |
| Residential mortgage loans | Loans held-for-investment [Member] | |||||
| Securities, Available-for-sale [Line Items] | |||||
| Financing Receivable, Allowance for Credit Loss | $ 1,500,000 | 1,500,000 | $ 2,200,000 | ||
| Realized Losses, Write offs on loans | $ (51,000) | $ (33,000) | $ (500,000) | ||
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- Definition Realized losses resulting from a complete or partial write off once the Company has determined all or a portion of an impaired securities cost basis is uncollectible. No definition available.
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- Definition For securities whose cash flows vary depending on prepayments, an effective yield retroactive to the time of purchase is periodically recomputed based on actual prepayments and changes in projected prepayment activity, and a catch-up adjustment, or "Catch-up Premium Amortization Adjustment," is made to amortization to reflect the cumulative impact of the change in effective yield. No definition available.
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- Definition Realized losses resulting from a complete or partial write off once the Company has determined all or a portion of an impaired loan's cost basis is uncollectible. No definition available.
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- Definition Amount 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). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of allowance for credit loss at acquisition date of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), purchased with credit deterioration. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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