Additional Shares Issued To Underwriters

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- Definition

At Market Continuous Offering Program Shares Authorized

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- Definition

At Market Continuous Offering Program Shares Sold

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- Definition

At the market equity program, realized net proceeds, net offering expenses

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No definition available.

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- Definition

At the market equity program, shares issued

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- Definition

At the market equity program, weighted average price per share

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No definition available.

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- Definition

Common Stock Purchase Price As Percentage Of Stock Market Value Under Dividend Reinvestment And Direct Stock Purchase Plan

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No definition available.

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- Definition

Dividend Reinvestment Plan, Shares Available For Issuance

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- Definition

Net Proceeds Realized From Issuance Of Shares To Underwriters

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No definition available.

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- Definition

Operating Partnership Units Redeemed

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No definition available.

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- Definition

Payments For Redemption Of Operating Partnership Units

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No definition available.

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- Definition

Payments For Repurchase Of Redeemable Preferred Stock Including Accrued Dividends

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No definition available.

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- Definition

Preferred Stock Dividends Accrued

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No definition available.

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- Definition

Public offering, per share

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No definition available.

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- Definition

Shares Issued To Underwriters

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No definition available.

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- Details

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

+ Details

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

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- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

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- Definition

Date the dividend to be paid was declared, in CCYY-MM-DD format.

+ References

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- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

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- Definition

The number of units converted into shares of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-Subparagraph (SAB TOPIC 4.F)

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-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 16

-Subparagraph a, b

-Article 6

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- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

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- Definition

Aggregate dividends declared during the period for each share of preferred stock outstanding.

+ References

No definition available.

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- Definition

The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

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-Paragraph 3

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-Subparagraph (SX 210.4-08.(d)(1))

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- Definition

The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer.

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- Definition

The cash inflow from the additional capital contribution to the entity.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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-SubTopic 10

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-Paragraph 14

-Subparagraph (a)

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- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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- Definition

Number of stock bought back by the entity at the exercise price or redemption price.

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-Topic 505

-SubTopic 10

-Section 50

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- Definition

The number of units or equivalent units outstanding for all classes.

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-Topic 272

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Shareholders' Equity (Narrative) (Details) (USD $)	0 Months Ended			12 Months Ended		0 Months Ended
Shareholders' Equity (Narrative) (Details) (USD $)	Oct. 10, 2014	Jun. 30, 2014	Jan. 13, 2014	Dec. 31, 2014	Dec. 31, 2013	Feb. 12, 2013	Mar. 11, 2013	Jan. 24, 2015	Jan. 12, 2015
Class of Stock [Line Items]
Public offering, realized net proceeds, net offering expenses			$ 41,300,000
Public offering, shares			6,900,000us-gaap_CommonStockSharesIssued	79,213,000us-gaap_CommonStockSharesIssued	72,200,000us-gaap_CommonStockSharesIssued
Shares issued to underwriters			900,000cdr_SharesIssuedToUnderwriters
At-the-market program, shares authorized				10,000,000
At-the-market program, shares sold				0
Stock price as percentage of market value				100.00%
Remaining shares authorized under DRIP				2,849,000
Redemptions of OP Units, shares	2,000cdr_OperatingPartnershipUnitsRedeemed	69,000cdr_OperatingPartnershipUnitsRedeemed			32,000cdr_OperatingPartnershipUnitsRedeemed
OP units converted				51,000	3,000
Number of OP units called by warrants				393,000	270,000
Accrued preferred stock dividends				1,600,000cdr_PreferredStockDividendsAccrued	1,600,000cdr_PreferredStockDividendsAccrued
Dividends payable, date declared				Jan. 24, 2015
Dividends payable, date to be paid				Feb. 20, 2015
Dividends payable, date of record				Feb. 10, 2015
Series B [Member]
Class of Stock [Line Items]
Dividend rate percentage				7.25%
Liquidation preference, per share				$ 25.00	$ 25.00
Redemption price per share				$ 25.00
Shares issued in public offering						2,000,000
Public offering, per share						$ 24.58
Public offering, realized net proceeds, net offering expenses						47,600,000
Additional shares issued to underwriters						300,000
Net proceeds realized from issuance of additional shares to underwriters						7,100,000
ATM equity program, shares issued					221,000
ATM equity program, weighted average price per share					$ 24.52
ATM equity program, realized net proceeds, net offering expenses					5,200,000
Series A [Member]
Class of Stock [Line Items]
Dividend rate percentage				8.875%
Redemption price per share				$ 25.00
Shares of Redeemable Preferred Stock redeemed and purchased							1,408,000
Total cash outlay for Redeemable Preferred Stock shares redeemed and purchased							35,400,000
Limited Partners' Interest In Operating Partnership [Member]
Class of Stock [Line Items]
Cash outlay for redeemed OP units	13,000	424,000			170,000
Mezzanine OP Units [Member]
Class of Stock [Line Items]
Redemptions of OP Units, shares					30,000
Subsequent Event [Member]
Class of Stock [Line Items]
Public offering, realized net proceeds, net offering expenses									$ 41,900,000
Public offering, shares									5,750,000
Shares issued to underwriters									750,000
Common stock, dividends declared								$ 0.05
Subsequent Event [Member] \| Series B [Member]
Class of Stock [Line Items]
Preferred stock dividends declared								$ 0.453125