Name:	cim_InvestmentOwnedWeightedAverageOfStatedInterestRatesAtEndOfPeriod
Namespace Prefix:	cim_
Data Type:	num: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:	num: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:	us-types:perUnitItemType
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:	us-types:perUnitItemType
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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-12C.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010

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_InvestmentSecondaryCategorizationAxis=cim_NonAgencySeniorMortgageBackedSecuritiesAvailableForSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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

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

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=cim_NonAgencySubordinatedMortgageBackedSecuritiesInterestOnlyAvailableForSaleMember
Namespace Prefix:
Data Type:	na
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Period Type:

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=cim_AgencyResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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