Debt Instrument, Face Amount, Extension One

No definition available.

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

- Definition

Outstanding amount of mortgage note payable of joint venture.

+ References

No definition available.

+ Details

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Namespace Prefix:	cuz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Ownership percentage of partner in Joint Venture.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.

+ References

No definition available.

+ Details

Name:	dei_DocumentFiscalYearFocus
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- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 23

-URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460

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Balance Type:	debit
Period Type:	duration

- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 55

-Paragraph 37

-URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

+ Details

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Period Type:	instant

- Definition

This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

+ References

+ Details

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Period Type:	duration

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 50

-Section 40

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 50

-Section 40

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629

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- Definition

Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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Period Type:	duration

- Details

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Property Transactions Property Transactions (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		6 Months Ended		3 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended				9 Months Ended					3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013 816 Congress [Member]	Apr. 25, 2013 816 Congress [Member] sqft	Sep. 30, 2013 Terminus Two Hundred LLC [Member]	Feb. 28, 2013 Terminus Office Holdings [Member]	Sep. 30, 2013 Terminus Office Holdings [Member]	Sep. 30, 2013 Terminus Office Holdings [Member]	Sep. 30, 2013 Terminus One Hundred LLC [Member]	Sep. 30, 2013 Post Oak Central [Member]	Feb. 28, 2013 Post Oak Central [Member] sqft	Feb. 28, 2013 MSREF Terminus Two Hundred LLC [Member] Terminus Two Hundred LLC [Member]	Sep. 30, 2013 Texas Acquisition [Member]	Jul. 29, 2013 Texas Acquisition [Member]	Jul. 19, 2013 Texas Acquisition [Member]	Jul. 19, 2013 Texas Acquisition [Member] Houston, Texas [Member] sqft	Jul. 19, 2013 Texas Acquisition [Member] Fort Worth, Texas [Member] sqft	Sep. 30, 2013 Term Loan [Member]	Jul. 29, 2013 Term Loan [Member] Texas Acquisition [Member]
Real Estate, Write-down or Reserve [Line Items]
Document Fiscal Year Focus			2013
Ownership Percentage of Partner in Joint Venture								50.00%						80.00%
Outstanding Amount of Mortgage Note Payable of Joint Venture														$ 74,600,000
Gain (Loss) on Disposition of Assets							19,700,000				37,100,000
Proceeds from Sale of Real Estate Held-for-investment			171,779,000	73,052,000				112,200,000
Business Combination, Acquisition Related Costs					342,000				122,000			231,000			4,200,000
Debt Instrument, Face Amount									82,000,000	82,000,000											950,000,000
Debt Instrument, Face Amount, Extension One																150,000,000
Proceeds from Equity Method Investment, Dividends or Distributions			65,563,000	12,065,000						39,200,000
Square Footage of Real Estate Property						435,000							1,300,000.0					4,300,000	980,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net						102,400,000							230,900,000	53,800,000			1,100,000,000
Gains (Losses) on Extinguishment of Debt	$ 0	$ 0	$ 0	$ (94,000)																$ 2,600,000