Name:	cim_InvestmentOwnedWeightedAverageOfStatedInterestRatesAtEndOfPeriod
Namespace Prefix:	cim_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

This element represents the weighted average yield on investments owned as of the reporting date.

No definition available.

Name:	cim_InvestmentOwnedWeightedAverageYieldsOfInterestAtEndOfPeriod
Namespace Prefix:	cim_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

This element represents the weighted average of the amortized costs of the securities (the average amount per security).

No definition available.

Name:	cim_InvestmentWeightedAverageAmortizedCostPerSecurity
Namespace Prefix:	cim_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

This element represents the weighted average of the fair values of the securities (the average amount per security).

No definition available.

Name:	cim_InvestmentWeightedAverageFairValuePerSecurity
Namespace Prefix:	cim_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_InvestmentHoldingsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

For investments which are quantified by principal amount, the principle balance held at close of period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Column B))
-URI http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010

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

Name:	us-gaap_InvestmentTypeAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_FinancialInstrumentAxis=cim_NonAgencySeniorMortgageBackedSecuritiesAvailableForSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_FinancialInstrumentAxis=cim_NonAgencySubordinatedMortgageBackedSecuritiesAvailableForSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_FinancialInstrumentAxis=cim_NonAgencySeniorMortgageBackedSecuritiesInterestOnlyAvailableForSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_FinancialInstrumentAxis=cim_AgencyInterestOnlyResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_FinancialInstrumentAxis=cim_AgencyCommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: