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Derivative Instruments, Outstanding Notional Amounts and Interest Rate Swap Agreements of Derivative Instruments (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2025	Dec. 31, 2024
Pay SOFR [Member]
Outstanding Notional Amounts and Interest Rate Swap Agreements [Abstract]
Total notional amount		$ 712,700	$ 907,800
Weighted average years to maturity		3 years 6 months	3 years 7 months 6 days
Fixed interest rate		1.40%	1.10%
Receive SOFR [Member]
Outstanding Notional Amounts and Interest Rate Swap Agreements [Abstract]
Total notional amount		$ 116,000	$ 264,000
Weighted average years to maturity		2 years 9 months 18 days	1 year 7 months 6 days
Fixed interest rate		3.40%	4.50%
Notional Amount of Interest Rate Swaps [Member]
Outstanding Notional Amounts and Interest Rate Swap Agreements [Abstract]
Total notional amount	[1]	$ 828,700	$ 1,171,750
Fair value		$ 13,676	$ 13,375
Weighted average pay rate		1.82%	1.84%
Weighted average receive rate		4.27%	4.64%
Weighted average years to maturity		3 years 4 months 24 days	3 years 1 month 6 days
Notional Amount of TBAs, Net [Member]
Outstanding Notional Amounts and Interest Rate Swap Agreements [Abstract]
Total notional amount		$ 415,775	$ 435,575
Fair value		(409,939)	(399,316)
Notional Amount of U.S. Treasury Futures [Member]
Outstanding Notional Amounts and Interest Rate Swap Agreements [Abstract]
Fair value		(1,673)	2,337
Not Designated as Hedging Instrument [Member]
Outstanding Notional Amounts and Interest Rate Swap Agreements [Abstract]
Total notional amount		435,425	809,275
Not Designated as Hedging Instrument [Member] | Notional Amount of Interest Rate Swaps [Member]
Outstanding Notional Amounts and Interest Rate Swap Agreements [Abstract]
Total notional amount		828,700	1,171,750
Not Designated as Hedging Instrument [Member] | Notional Amount of TBAs, Net [Member]
Outstanding Notional Amounts and Interest Rate Swap Agreements [Abstract]
Total notional amount		415,775	435,575
Not Designated as Hedging Instrument [Member] | Notional Amount of U.S. Treasury Futures [Member]
Outstanding Notional Amounts and Interest Rate Swap Agreements [Abstract]
Total notional amount		$ 22,500	$ 73,100
[1] Includes $712.7 million notional of receive SOFR and pay fixed of 1.4% and $116.0 million notional of receive fixed of 3.4% and pay SOFR with weighted average maturities of 3.5 years and 2.8 years, respectively, as of September 30, 2025. Includes $907.8 million notional of receive SOFR and pay fixed of 1.1% and $264.0 million notional of receive fixed of 4.5% and pay SOFR with weighted average maturities of 3.6 years and 1.6 years, respectively, as of December 31, 2024.

X

- Definition

Derivative weighted average nominal pay rate used to calculate amount of money paid per unit time of derivative instrument.

+ References

No definition available.

+ Details

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X

- Definition

Derivative weighted average nominal receive rate used to calculate amount of money received per unit time of derivative instrument.

+ References

No definition available.

+ Details

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X

- Definition

Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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X

- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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X

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

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- References

No definition available.

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- Details

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