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Valuation Unobservable Input Reconciliation (Details) - Level 3 [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Agency RMBS [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | $ 5,654 | $ 8,196
Purchases | 2,726 | 1,845
Proceeds from sales | (761) | 0
Principal repayments | (133) | 0
(Amortization)/accretion, net | (1,358) | (2,566)
Net realized gains (losses) | (1,062) | (1,043)
Change in net unrealized gains (losses) | 1,748 | 172
Transfers |  |
Transfers into level 3 | 621 | 1,055
Transfers out of level 3 | (3,350) | (2,005)
Ending balance | 4,085 | 5,654
Change in net unrealized gains (losses) for level 3 assets still held | 1,200 | 200
Non-Agency RMBS [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 7,259 | 13,296
Purchases | 12,807 | 2,701
Proceeds from sales | (6,502) | (4,040)
Principal repayments | (128) | 1,115
(Amortization)/accretion, net | (71) | 546
Net realized gains (losses) | 23 | 270
Change in net unrealized gains (losses) | 82 | (141)
Transfers |  |
Transfers into level 3 | 3,060 | 337
Transfers out of level 3 | (4,696) | 4,595
Ending balance | 11,834 | 7,259
Change in net unrealized gains (losses) for level 3 assets still held | 300 | (200)
Residential Mortgage Backed Securities [Member] |  |
Transfers |  |
Transfers into level 3 | 3,700 | 1,400
Transfers out of level 3 | $ (8,000) | $ (6,600)

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- Definition Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortized Premiums/Accreted Discounts, Net + References No definition available. + Details
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- Definition Fair Value, Measurements with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Principal Repayments + References No definition available. + Details
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- Definition Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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