Mortgage Loans Payable and Credit Facilities (Schedule of Principal Payments on Secured Term Loans) (Details)	12 Months Ended
Dec. 31, 2022 USD ($) Term	Dec. 31, 2021 USD ($)
Unamortized Debt Issuance Costs
Unamortized Debt Issuance Costs	$ (3,538,000)	$ (3,129,000)
Revolving Credit Facility [Member]
Debt Instrument, Net
Line of credit facility extension allowed term \| Term	2
Line of credit facility extension allowed period	1 year
Term Loan [Member]
Debt Instrument, Gross
2027	$ 126,000
Thereafter	134,874,000
Total	$ 135,000,000

Debt instrument carrying amount maturities repayments of principal after year five.

No definition available.

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Period Type:	instant

- Definition

Debt instrument carrying amount maturities repayments of principal in year five.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Debt instrument gross.

+ References

No definition available.

+ Details

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- Definition

Line of credit facility extension allowed period.

+ References

No definition available.

+ Details

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Namespace Prefix:	cdr_
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Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility extension allowed term.

+ References

No definition available.

+ Details

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Namespace Prefix:	cdr_
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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

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-Name Accounting Standards Codification
-Topic 210
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-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1D
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399

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Balance Type:	debit
Period Type:	instant

- References

No definition available.

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- References

No definition available.

+ Details

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Period Type:	duration

- Details

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- Details

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