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v3.22.2

Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2022 USD ($)
Summary Of Significant Accounting Policies [Line Items] |
Lease rent deferred | $ 3.5
Lease rent deferrals continued to recognize rental income | 2.4
Lease rent waived | 2.4
Maximum [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Lease rent deferred outstanding | $ 0.1

X
- Definition Lease rent deferrals continued to recognize rental income. + References No definition available. + Details
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Namespace Prefix: | cdr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lease rent deferred. + References No definition available. + Details
Name: | cdr_LeaseRentDeferred
Namespace Prefix: | cdr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lease rent deferred outstanding. + References No definition available. + Details
Name: | cdr_LeaseRentDeferredOutstanding
Namespace Prefix: | cdr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lease rent waived. + References No definition available. + Details
Name: | cdr_LeaseRentWaived
Namespace Prefix: | cdr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Summary of significant accounting policies. + References No definition available. + Details
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Namespace Prefix: | cdr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |