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v3.21.2

Revenues (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021
Revenues [Abstract] |  |
Unpaid billed charges of rent and tenant reimbursements | $ 0.3 | $ 1.3
Unrecorded revenue from tenants | $ 0.3 | $ 1.3

X
- Definition Unpaid billed charges of rent and tenant reimbursements. + References No definition available. + Details
Name: | cdr_UnpaidBilledChargesOfRentAndTenantReimbursements
Namespace Prefix: | cdr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unrecorded revenue from tenants. + References No definition available. + Details
Name: | cdr_UnrecordedRevenueFromTenants
Namespace Prefix: | cdr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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