Intangible Assets and Liabilities (Narratives) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Finite Lived Intangible Assets Liabilities [Line Items]
Finite lived intangibles assets useful life		1 year 0 months 0 days
Net amortization of intangibles	$ 8.9	$ 6.1
Maximum
Finite Lived Intangible Assets Liabilities [Line Items]
Finite lived intangibles assets useful life		40 years 0 months 0 days

The aggregate expense charged against earnings to allocate the cost of intangible assets and liabilities (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

No definition available.

Name:	cpa17_AmortizationOfIntangibleAssetsLiabilities
Namespace Prefix:	cpa17_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration