XML 77 R66.htm IDEA: XBRL DOCUMENT
v3.25.3

Repurchase Agreements (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Repurchase Agreements [Abstract] |  |
Weighted average of remaining maturities days | 27 days | 18 days
Repurchase Agreement Characteristics Remaining Maturities [Abstract] |  |
Less than one month, repurchase agreements | $ 597,757 | $ 1,005,685
One to three months, repurchase agreements | 509,384 | 71,572
Total repurchase agreements | $ 1,107,141 | $ 1,077,257
Repurchase Agreement Characteristics, Weighted Average Rates [Abstract] |  |
Less than one month, weighted average rate | 4.31% | 4.75%
One to three months, weighted average rate | 4.31% | 4.72%
Weighted average rate | 4.31% | 4.75%

X
- References No definition available. + Details
Name: | chmi_RepurchaseAgreementCharacteristicsRemainingMaturitiesAbstract
Namespace Prefix: | chmi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | chmi_RepurchaseAgreementCharacteristicsWeightedAverageRatesAbstract
Namespace Prefix: | chmi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Repurchase agreement weighted average interest rate held by the entity with maturities within one month. + References No definition available. + Details
Name: | chmi_RepurchaseAgreementLessThanOneMonthWeightedAverageRate
Namespace Prefix: | chmi_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the purchase obligation maturing with in one month of the latest fiscal year. + References No definition available. + Details
Name: | chmi_RepurchaseAgreementObligationLessThanOneMonthMaturities
Namespace Prefix: | chmi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fixed and determinable portion of the purchase obligation maturing with in one to three months of the latest fiscal year. + References No definition available. + Details
Name: | chmi_RepurchaseAgreementObligationOneToThreeMonthsMaturities
Namespace Prefix: | chmi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Repurchase agreement weighted average interest rate held by the entity with maturities greater than one months, but three months or less. + References No definition available. + Details
Name: | chmi_RepurchaseAgreementOneToThreeMonthsWeightedAverageRate
Namespace Prefix: | chmi_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Repurchase agreement weighted average interest rate held by the entity total. + References No definition available. + Details
Name: | chmi_RepurchaseAgreementWeightedAverageRate
Namespace Prefix: | chmi_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Refers to remaining weighted average maturity period of the repurchase agreement, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | chmi_RepurchaseAgreementsMaturityPeriod
Namespace Prefix: | chmi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | srt_BrokersAndDealersAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-22 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-21 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-20 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-15 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 + Details
Name: | us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant