Name:	cim_InvestmentOwnedWeightedAverageOfStatedInterestRatesAtEndOfPeriod
Namespace Prefix:	cim_
Data Type:	num:percentItemType
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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
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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:	num: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:	num:perShareItemType
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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
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Data Type:	xbrli:stringItemType
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Period Type:	duration

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

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