Acquisition

No definition available.

Name:	cpa17_AcquisitionAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	cpa17_ConstructionInProgressPlacedIntoService
Namespace Prefix:	cpa17_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Construction costs capitalized to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service.

+ References

No definition available.

+ Details

Name:	cpa17_FundsCapitalizedForConstructionInProgress
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The gain recorded in the period arising from the change in ownership of an equity investment.

+ References

No definition available.

+ Details

Name:	cpa17_GainOnChangeInControlOfInterests
Namespace Prefix:	cpa17_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The change in ownership percentage of equity investments during the period.

+ References

No definition available.

+ Details

Name:	cpa17_IncreaseDecreaseinEquityInvestmentOwnershipPercentage
Namespace Prefix:	cpa17_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The indirect ownership interest in equity investments held by the company as of the reporting date.

+ References

No definition available.

+ Details

Name:	cpa17_IndirectOwnershipInterestInEquityInvestments
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The total cost to acquire investments. In instances where the acquired investment is categorized as a business combination the investment price excludes fees and expenses related to the acquisition, whereas when the investment is categorized as an real estate acquisition the acquisition fees are capitalized.

+ References

No definition available.

+ Details

Name:	cpa17_InvestmentPurchasePrice
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of construction projects that have been completed and reclassified out of construction in progress to an appropriate asset account.

+ References

No definition available.

+ Details

Name:	cpa17_NumberOfCompletedConstructionProjects
Namespace Prefix:	cpa17_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of construction projects currently in progress.

+ References

No definition available.

+ Details

Name:	cpa17_NumberOfConstructionProjectsDuringPeriod
Namespace Prefix:	cpa17_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Properties Held For Sale

+ References

No definition available.

+ Details

Name:	cpa17_NumberofPropertiesHeldForSale
Namespace Prefix:	cpa17_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of properties sold during the period.

+ References

No definition available.

+ Details

Name:	cpa17_NumberofPropertiesSold
Namespace Prefix:	cpa17_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Outstanding Build to Suit Projects, Count

+ References

No definition available.

+ Details

Name:	cpa17_OutstandingBuildtoSuitProjectsCount
Namespace Prefix:	cpa17_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Partially Completed Construction Projects, Count

+ 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

Name:	cpa17_UnfundedCommitment
Namespace Prefix:	cpa17_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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=34752592&loc=d3e1043-128460

+ Details

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

- Definition

Amount of facility held for productive use including, but not limited to, office, production, storage and distribution facilities, acquired at the acquisition date.

+ 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=56956791&loc=d3e4845-128472

+ Details

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

- Definition

Amount of real estate acquired, at the acquisition date.

+ References

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the carrying value of a short-term real estate loan to finance building costs. The funds are disbursed as needed or in accordance with a prearranged plan; generally, a portion of the funds is disbursed at inception and the remainder as construction progresses. The money is repaid on completion of the project, usually from the proceeds of a mortgage loan. The rate is normally higher than the prime rate, and there is usually an origination fee. The effective yield on these loans tends to be high, and the lender has a security interest in the real property. Note that there are separate concepts for the current and noncurrent portions of long-term construction loans.

+ 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 210.5-02.19(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20
-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

+ References

No definition available.

+ Details

Name:	us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_ForeignCurrencyTranslationAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ 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=56944662&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
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-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.12)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 9
-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 11
-Article 7

+ Details

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

- Definition

Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

+ References

Reference 1: 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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Amount of cash outflow for the allowance granted to lessee and/or direct costs incurred by lessor used to prepare the leased premises for tenant's occupancy.

+ References

No definition available.

+ Details

Name:	us-gaap_PaymentsForTenantImprovements
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of reclassification, impairment, donation, or other change to long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2921-110230

+ Details

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

- Definition

Amount of increase in real estate investments related to improvements for entities with a substantial portion of business acquiring and holding investment real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04.(c) Schedule III)
-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 970
-SubTopic 360
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-28.4)
-URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024

+ Details

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

- Details

Name:	us-gaap_RealEstatePropertiesAxis=us-gaap_RealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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Balance Type:
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- Details

Name:	us-gaap_RealEstatePropertiesAxis=cpa17_OperatingRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=cpa17_RealEstateUnderConstructionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	cpa17_BuiltToSuitAxisAxis=cpa17_NewBuildToSuitProjectsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	cpa17_BuiltToSuitAxisAxis=cpa17_OngoingBuildToSuitProjectsMember
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- Details

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- Details

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Net Investments in Properties and Real Estate Under Construction (Narratives) (Details)				3 Months Ended			6 Months Ended
	Apr. 11, 2016 USD ($)	Feb. 10, 2016 USD ($)	Jan. 08, 2016 USD ($)	Jun. 30, 2016 USD ($) property	Jun. 30, 2016 USD ($) property	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) property	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Foreign Currency Translation
Effects of foreign currency translation on balance sheet item					$ (19,592,000)	$ 28,840,000	$ 11,736,000	$ (59,890,000)
Acquisition
Acquired finite-lived intangible asset, amount							11,092,000
Acquisition costs, expensed					3,983,000	39,000	5,340,000	642,000
Gain on change in control of interests					49,922,000	0	49,922,000	0
Earnings from equity method investments					1,580,000	4,488,000	3,752,000	7,703,000
Construction loan				$ 1,500,000	$ 1,500,000		$ 1,500,000
Outstanding build to suit projects, count \| property				1	1		1
Partially completed construction projects, count \| property				1	1		1
Real estate
Foreign Currency Translation
Effects of foreign currency translation on balance sheet item							$ 20,600,000
Acquisition
Investment purchase price							21,500,000
Land				$ 3,100,000	$ 3,100,000		3,100,000
Buildings				17,100,000	17,100,000		17,100,000
Acquired finite-lived intangible asset, amount							1,300,000
Acquisition costs, expensed							1,100,000
Building improvements							3,000,000
Real estate \| Student Accomidation in Jacksonville, FL
Acquisition
Investment purchase price			$ 17,300,000
Real estate \| Industrial facility in Houston, TX
Acquisition
Investment purchase price		$ 4,200,000
Operating real estate
Acquisition
Investment purchase price							11,363,000
Land				26,941,000	26,941,000		26,941,000
Buildings				109,399,000	109,399,000		109,399,000
Building improvements							300,000
Gain on change in control of interests							$ 49,922,000	49,900,000
Earnings from equity method investments				400,000
Business acquisition, transaction costs										$ 3,700,000
Number of properties sold \| property							12
Reclassification of assets							$ (60,900,000)
Real estate under construction
Acquisition
Capitalized funds							10,485,000
Assets placed into service, value							1,965,000
New Build-to-Suit Project \| Real estate under construction
Acquisition
Capitalized funds							$ 6,800,000
Number of open construction projects \| property							1
Ongoing Build-to-Suit Projects
Acquisition
Unfunded commitments				$ 10,300,000	$ 10,300,000		$ 10,300,000		$ 2,800,000
Ongoing Build-to-Suit Projects \| Real estate under construction
Acquisition
Capitalized funds							$ 2,100,000
Number of open construction projects \| property							4
Substantially Completed
Acquisition
Assets placed into service, value							$ 1,000,000
Payments for tenant improvements							$ 1,000,000
Number of construction projects put in service \| property							2
Held-for-sale
Acquisition
Reclassification of assets							$ 137,000,000
Number of properties held for sale, count \| property				22	22		22
Madison Storage NYC, LLC and Veritas Group IX-NYC, LLC \| Self storage
Acquisition
Investment purchase price	$ 22,000,000
Acquisition costs, expensed	$ 3,700,000
Ownership interest, percentage	100.00%
Additional ownership interest acquired	15.00%
Equity Method Investments
Acquisition
Earnings from equity method investments					$ 2,637,000	5,559,000	$ 6,057,000	8,829,000
Equity Method Investments \| Self storage
Acquisition
Earnings from equity method investments					$ 0	$ (508,000)	$ (394,000)	$ (947,000)
Equity Method Investments \| Third Party \| Madison Storage NYC, LLC and Veritas Group IX-NYC, LLC \| Self storage
Acquisition
Ownership interest, percentage				45.00%	45.00%		45.00%
Indirect ownership interest in equity investments				40.00%	40.00%		40.00%