PLEDGED ASSETS - Assets Pledged to Counterparties (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Pledged Assets [Line Items]
Accrued interest receivable	$ 14,853	$ 18,859
Restricted cash	130,199	65,299
Total Assets Pledged To Counterparties	4,758,342	6,620,228
Repurchase Agreement [Member]
Pledged Assets [Line Items]
Restricted cash	113,589	57,264
Total Assets Pledged To Counterparties	4,705,252	6,582,440
Derivative [Member]
Pledged Assets [Line Items]
Restricted cash	16,610	8,035
Total Assets Pledged To Counterparties	53,090	37,788
Residential Mortgage Backed Securities [Member]
Pledged Assets [Line Items]
Accrued interest receivable	14,819	18,817
Residential Mortgage Backed Securities [Member] \| Pass Through Certificate [Member]
Pledged Assets [Line Items]
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	4,369,564	6,294,102
Residential Mortgage Backed Securities [Member] \| Structured Finance [Member]
Pledged Assets [Line Items]
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	207,283	212,270
Residential Mortgage Backed Securities [Member] \| Repurchase Agreement [Member]
Pledged Assets [Line Items]
Accrued interest receivable	14,816	18,804
Residential Mortgage Backed Securities [Member] \| Repurchase Agreement [Member] \| Pass Through Certificate [Member]
Pledged Assets [Line Items]
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	4,369,564	6,294,102
Residential Mortgage Backed Securities [Member] \| Repurchase Agreement [Member] \| Structured Finance [Member]
Pledged Assets [Line Items]
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	207,283	212,270
Residential Mortgage Backed Securities [Member] \| Derivative [Member]
Pledged Assets [Line Items]
Accrued interest receivable	3	13
Residential Mortgage Backed Securities [Member] \| Derivative [Member] \| Pass Through Certificate [Member]
Pledged Assets [Line Items]
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	0	0
Residential Mortgage Backed Securities [Member] \| Derivative [Member] \| Structured Finance [Member]
Pledged Assets [Line Items]
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	0	0
US Treasury Notes
Pledged Assets [Line Items]
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	36,477	29,740
US Treasury Notes \| Repurchase Agreement [Member]
Pledged Assets [Line Items]
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	0	0
US Treasury Notes \| Derivative [Member]
Pledged Assets [Line Items]
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	$ 36,477	$ 29,740

Total securities and cash pledged as collateral.

No definition available.

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- References

No definition available.

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- Definition

The fair value as of the balance sheet date of financial instruments and other positions owned by the entity and pledged to counterparties as collateral, including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 45
-Paragraph 1
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-Publisher FASB
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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

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