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

Aggregate distributions declared during the period for each of the share outstanding.

No definition available.

Name:	cpa17_QuarterlyDistributionsDeclaredPerShare
Namespace Prefix:	cpa17_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration