Statement of Shareholders' Equity (Parentheticals) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Stock Transactions Parenthetical Disclosures
Distributions Declared Per Share	$ 0.1625	$ 0.1625	$ 0.4875	$ 0.3250	$ 0.6500

Distribution of earnings in the form of cash, property or capital stock declared by the board of directors to be distributed to shareholders.

No definition available.

Name:	cpa17_DistributionsDeclaredPerShare
Namespace Prefix:	cpa17_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration