Under the terms of the advisory agreements, percentage of total performance fees that is receivable in cash.

No definition available.

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Data Type:	num:percentItemType
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Period Type:	duration

- Definition

Under the terms of the advisory agreements, percentage of total performance fees that is receivable in restricted shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	cpa17_
Data Type:	num:percentItemType
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- Definition

Represents the per share dealer manager fee paid in connection with sale of common stock.

+ References

No definition available.

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of total investment cost reimbursable to the advisor for legal fees.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

The percentage threshold for personnel and overhead reimbursement chargeable by the advisor for personnel cost. Personnel expenses excludes costs related to the advisor’s legal transaction group allocated. The threshold is based on pro rata revenue.

+ References

No definition available.

+ Details

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- Definition

The price per share on shares issued to the advisor for asset management fees.

+ References

No definition available.

+ Details

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- Definition

The percentage of offering proceeds that the company is obligated to reimburse to the advisor for bon fide due diligence expenses.

+ References

No definition available.

+ Details

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- Definition

The percentage limit of the gross proceeds from offering for total organization and offering expenses.

+ References

No definition available.

+ Details

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- Definition

The percentage of fees paid to the advisor for the structuring and neogiating investments on the company's behalf and based on the aggreage total costs of an investment for all investments other than those in readily-marketable real estate securities purchased in the secondary market.

+ References

No definition available.

+ Details

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- Definition

The percentage fee paid to the advisor for managing the company's assets based on the average market value or average equity value, as applicable, depending on the type of investments.

+ References

No definition available.

+ Details

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- Definition

The maximum percentage of available cash generated from operations, excluding capital proceeds, as reduced by operating expenses and debt service, excluding prepayments and balloon payments, of the operating partnership that is paid to the advisor for service fees.

+ References

No definition available.

+ Details

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- Definition

The percentage guideline for when the advisor is required to reimburse the amount of operating expenses that exceeds the greater of the percentages for average invested assets or adjusted net income.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

The percentage fee based on the lesser of competitive real estate commission or the contract sales prices of the investment being sold that is paid to the advisor for services provided in connection with disposition.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
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- Definition

The percentage of our common stock outstanding held by our advisor.

+ References

No definition available.

+ Details

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

- References

No definition available.

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- Definition

The advisor's preferred non-compounded cumulative distribution return per annum.

+ References

No definition available.

+ Details

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- Definition

The total amount reimbursed related to costs paid by the advisor and its affiliates in connection with the offering of our securities as of the balance sheet date.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

The percentage overage of gross offering proceeds for which the advisor agrees to be responsible for the payment of organization and offering proceeds.

+ References

No definition available.

+ Details

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

- Definition

Represents the per share commission rate paid in connection with the sale of common stock.

+ References

No definition available.

+ Details

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Namespace Prefix:	cpa17_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

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Period Type:	duration

- Definition

The percentage of gross offering proceeds related to the limit on underwriting compensation prescribed by Financial Industry Regulatory Authority, Inc.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The annual interest rate charged to affiliates on the unpaid balance of transaction fees.

+ References

No definition available.

+ Details

Name:	cpa17_UnpaidTransactionFeeInterestRate
Namespace Prefix:	cpa17_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Amount of net assets (liabilities).

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-Name Regulation S-X (SX)
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-Section 09
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Balance Type:	debit
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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Balance Type:	credit
Period Type:	instant

- Definition

Stated maturity date of the mortgage loan receivable on real estate, in CCYY-MM-DD format.

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-Name Accounting Standards Codification
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-Subparagraph (SX 210.5-04.(c) Schedule IV)
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-Paragraph 1
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The amount for notes payable (written promise to pay), due to related parties.

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-Name Accounting Standards Codification
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The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

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Agreements and Transactions with Related Parties (Narratives) (Details) - USD ($)				12 Months Ended
	Aug. 26, 2015	Jul. 14, 2015	Jul. 01, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2015	Oct. 31, 2014	Mar. 31, 2014	Jan. 31, 2013
Acquisitions and Disposition Fees
Preferred return by advisor				5.00%
Interest rate on unpaid deferred acquisition fees				5.00%
Asset Management Fees and Available Cash Distributions
Net asset value (usd per share)				$ 10.24	$ 9.72
Percentage of asset management fees paid in cash				50.00%
Percentage of asset management fees paid in shares				50.00%	100.00%	100.00%
Common stock shares outstanding, shares				337,065,419	328,480,839
Percentage of available cash distribution to advisor				10.00%
Personnel And Office Rent Reimbursement
Maximum personnel and overhead reimbursement, percentage				2.40%
Legal fee reimbursement rate				0.25%
Percentage limit on O&O				15.00%
Selling commission per share sold (usd per share)				$ 0.65
Dealer manager fee per share sold (usd per share)				$ 0.35
Underwriting compensation limit				10.00%
Offering proceeds reimbursed for due diligence expenses percentage				0.50%
Reimbursement threshold				4.00%
Reimbursed offering costs												$ 20,900,000
Line of credit, maximum borrowing capacity	$ 250,000,000			$ 136,800,000
Repayment of notes payable to affiliate				25,000,000	$ 0	$ 0
Equity investment				$ 514,147,000	$ 531,000,000
Office facility in Norway
Personnel And Office Rent Reimbursement
Ownership interest, percentage										49.00%
Net Assets										$ 108,300,000
Equity investment										$ 53,100,000
Office facility in Warsaw, Poland
Personnel And Office Rent Reimbursement
Ownership interest, percentage											50.00%
Net Assets											$ 147,900,000
Equity investment											$ 74,000,000
Forecast
Personnel And Office Rent Reimbursement
Maximum personnel and overhead reimbursement, percentage							2.00%	2.20%
Adjusted net income
Personnel And Office Rent Reimbursement
Percentage of operating expenses reimbursements				25.00%
Average invested assets
Personnel And Office Rent Reimbursement
Percentage of operating expenses reimbursements				2.00%
Long-term net lease
Acquisitions and Disposition Fees
Percentage of acquisition fees				4.50%
Long-term net lease \| Average market value
Asset Management Fees and Available Cash Distributions
Percentage of asset management fees				0.50%
Long-term net lease \| Current
Acquisitions and Disposition Fees
Percentage of acquisition fees				2.50%
Long-term net lease \| Deferred
Acquisitions and Disposition Fees
Percentage of acquisition fees				2.00%
Minimum
Personnel And Office Rent Reimbursement
Debt maturity date				Aug. 31, 2016
Ownership interest, percentage				7.00%
Minimum \| Average equity value
Asset Management Fees and Available Cash Distributions
Percentage of asset management fees				1.50%
Minimum \| Non-long term net lease
Acquisitions and Disposition Fees
Percentage of acquisition fees				1.00%
Maximum
Personnel And Office Rent Reimbursement
Debt maturity date				Aug. 31, 2039
Ownership interest, percentage				97.00%
Maximum \| Real estate commission
Acquisitions and Disposition Fees
Percentage of subordinated disposition fees				50.00%
Maximum \| Average equity value
Asset Management Fees and Available Cash Distributions
Percentage of asset management fees				1.75%
Maximum \| Contract sales price of investment
Acquisitions and Disposition Fees
Percentage of subordinated disposition fees				3.00%
Maximum \| Non-long term net lease
Acquisitions and Disposition Fees
Percentage of acquisition fees				1.75%
Advisor
Asset Management Fees and Available Cash Distributions
Common stock shares outstanding, shares				10,404,985
Percentage of total common stock outstanding held by related party				3.10%
WPC
Personnel And Office Rent Reimbursement
Line of credit, maximum borrowing capacity									$ 75,000,000.0
Notes payable related party		$ 15,000,000	$ 10,000,000
Debt maturity date		Dec. 30, 2015	Dec. 30, 2015
Repayment of notes payable to affiliate	$ 25,000,000
WPC \| LIBOR
Personnel And Office Rent Reimbursement
Basis spread		1.10%