XML 68 R57.htm IDEA: XBRL DOCUMENT v3.25.3

Derivative Instruments, Information of TBA Derivatives (Details) - Notional Amount of TBAs, Net [Member] - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
TBA Derivatives [Abstract]
Notional	$ 415,775	$ 435,575
Cost Basis	(409,383)	(409,748)
Fair Value	(409,939)	(399,316)
Net Carrying Value	(555)	10,434
Purchase Contracts [Member]
TBA Derivatives [Abstract]
Notional	368,650	234,625
Cost Basis	374,690	238,096
Fair Value	374,268	237,021
Net Carrying Value	(421)	(1,074)
Sale Contracts [Member]
TBA Derivatives [Abstract]
Notional	784,425	670,200
Cost Basis	(784,073)	(647,844)
Fair Value	(784,207)	(636,337)
Net Carrying Value	$ (134)	$ 11,508

X

- Definition

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

+ References

No definition available.

+ Details

Name:	chmi_DerivativeCarryingValueNet
Namespace Prefix:	chmi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Derivative assets measured at implied cost basis

+ References

No definition available.

+ Details

Name:	chmi_DerivativeImpliedCostBasis
Namespace Prefix:	chmi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	chmi_TBADerivativesAbstract
Namespace Prefix:	chmi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=chmi_TbaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PositionAxis=us-gaap_LongMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PositionAxis=us-gaap_ShortMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: