The percentage increase or decrease of the U.S. dollar in relation to the Euro at period end date.

No definition available.

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Balance Type:	na
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- Definition

Amount of assets under construction that are now placed into service as the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	cpa17_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

+ References

No definition available.

+ Details

Name:	cpa17_ForeignCurrencyExchangeRate
Namespace Prefix:	cpa17_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of properties acquired related to the respective investment.

+ References

No definition available.

+ Details

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Namespace Prefix:	cpa17_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of commitment unfunded as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	cpa17_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-10.(c)(7)(ii))

-URI http://asc.fasb.org/extlink&oid=21918352&loc=d3e511914-122862

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 10

-Paragraph c

-Subparagraph 3(ii)(A)

-Article 4

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Balance Type:	debit
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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 59

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance with a finite life acquired.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of interest capitalized during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Allowance for Funds Used during Construction

-URI http://asc.fasb.org/extlink&oid=6504829

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 34

-Paragraph 21

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Balance Type:	debit
Period Type:	duration

- Definition

Net of tax and reclassification adjustments of the change in the balance sheet adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity. Also includes the following: gain (loss) on foreign currency forward exchange contracts; foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; and gain (loss) on a derivative instrument or nonderivative financial instrument that may give rise to a foreign currency transaction gain (loss) that has been designated and qualified as a hedging instrument for hedging of the foreign currency exposure of a net investment in a foreign operation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

-Paragraph 20

-Subparagraph (b,c)

-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900

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

- Definition

The cash outflow from construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 17

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585

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Net Investments in Properties and Real Estate Under Construction (Narratives) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Investments In Real Estate
Acquisition costs, capitalized				$ 2,600,000
Change in euro/dollar currency exchange rate percentage			0.70%
Foreign currency exchange rate	1.2860		1.2860		1.2950
Foreign Currency Transaction Gain (Loss), Unrealized	13,905,000	(29,688,000)	(2,432,000)	16,905,000	(12,753,000)
Real Estate
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	316,100,000		316,100,000
Acquisition costs, capitalized			15,500,000
Foreign Currency Transaction Gain (Loss), Unrealized			3,300,000
Finite-lived intangible assets acquired			75,000,000
Real Estate \| Debt Assumed
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	169,000,000		169,000,000
Number of properties acquired	8		8
Real Estate \| Other Real Estate Investments
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	5,000,000		5,000,000
Number of properties acquired	2		2
Real Estate \| RLJ-Mclarty-Landers Automotive Holdings, LLC
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	66,900,000		66,900,000
Number of properties acquired	9		9
Real Estate \| R.R Donnellly & Sons Company
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	36,300,000		36,300,000
Number of properties acquired	1		1
Real Estate \| South University
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	25,000,000		25,000,000
Number of properties acquired	2		2
Real Estate \| Bearing Technologies LTD
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	7,000,000		7,000,000
Number of properties acquired	1		1
Real Estate \| Clayco Inc
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	6,900,000		6,900,000
Number of properties acquired	1		1
Real Estate \| Shale-Inland Holdings LLC
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	14,600,000		14,600,000
Number of properties acquired	1,000,000		1,000,000
Acquisition costs, expensed			800,000
Operating Real Estate
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	25,300,000		25,300,000
Acquisition costs, capitalized			700,000
Finite-lived intangible assets acquired			3,100,000
Operating Real Estate \| Self Storage
Investments In Real Estate
Number of properties acquired	7		7
Real Estate Under Construction
Investments In Real Estate
Acquisition costs, capitalized			3,000,000
Payments for construction in progress			29,400,000
Assets placed into service	114,900,000		114,900,000
Interest costs, capitalized			1,300,000
Unfunded commitments	50,800,000		50,800,000
Real Estate Under Construction \| Nippon Sheet Glass
Investments In Real Estate
Number of properties acquired	1		1
Assets placed into service	25,200,000		25,200,000
Real Estate Under Construction \| Sabre Communications
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	17,800,000		17,800,000
Number of properties acquired	1		1
Payments for construction in progress			2,300,000
Real Estate Under Construction \| Syncreon Logisitics Polska Sp.
Investments In Real Estate
Business acquisition cost of acquired entity purchase price	8,300,000		8,300,000
Number of properties acquired	1		1
Payments for construction in progress			$ 1,500,000