The net gain (loss) recognized in the statement of operations upon termination of interest rate swap agreements.

No definition available.

Name:	cim_GainLossOnTerminationOfInterestRateSwaps
Namespace Prefix:	cim_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The weighted average maturity period of interest rate swap agreements.

+ References

No definition available.

+ Details

Name:	cim_InterestRateSwapWeightedAverageMaturity
Namespace Prefix:	cim_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

As of the reporting date, the weighted average rate (based on notional amount) the entity is contractually obligated to pay counterparties under interest rate swap agreements.

+ References

No definition available.

+ Details

Name:	cim_InterestRateSwapWeightedAveragePaymentRate
Namespace Prefix:	cim_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

As of the reporting date, the weighted average rate (based on notional amount) the entity is contractually entitled to receive from counterparties under interest rate swap agreements.

+ References

No definition available.

+ Details

Name:	cim_InterestRateSwapWeightedAverageReceiveRate
Namespace Prefix:	cim_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Notional amount of derivatives terminated during the period.

+ References

No definition available.

+ Details

Name:	cim_NotionalAmountOfDerivativesTerminations
Namespace Prefix:	cim_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Fair value of credit risk derivative asset after deduction of credit risk derivative liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5708775-113959

+ Details

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

- Definition

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.

+ References

No definition available.

+ Details

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

- Details

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

Derivative Instruments - Narrative (Detail) - USD ($)			3 Months Ended		9 Months Ended
Derivative Instruments - Narrative (Detail) - USD ($)	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Realized gains (losses) on terminations of interest rate swaps			$ (148,114,000)	$ 0	$ (351,372,000)	$ 0
The weighted average pay rate on the Company's interest rate swaps	2.60%	2.58%	2.60%		2.60%
The weighted average receive rate on the Company's interest rate swaps	2.22%	2.69%	2.22%		2.22%
The weighted average maturity on the Company's interest rate swaps	6 years	7 years
Fair value of credit risk derivative instruments in a net asset (liability) position	$ (311,000,000)		$ (311,000,000)		$ (311,000,000)
Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount of derivative terminated			$ 3,300,000,000		$ 6,200,000,000