Distributions Made to Partners, Fees Payable, Percent of Property Sale Price

No definition available.

Name:	crpi_DistributionsMadeToPartnersFeesPayablePercentOfPropertySalePrice
Namespace Prefix:	crpi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Distributions Made to Partners, Proceeds from Sale on Investment after Aggregate Fee, Percent

+ References

No definition available.

+ Details

Name:	crpi_DistributionsMadeToPartnersProceedsFromSaleOnInvestmentAfterAggregateFeePercent
Namespace Prefix:	crpi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Distributions Made to Partners, Proceeds from Sale on Investment, Aggregate Fee, Percent

+ References

No definition available.

+ Details

Name:	crpi_DistributionsMadeToPartnersProceedsFromSaleOnInvestmentAggregateFeePercent
Namespace Prefix:	crpi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of Net Income (Loss) Allocated to General Partners

+ References

No definition available.

+ Details

Name:	crpi_PercentageOfNetIncomeLossAllocatedToGeneralPartners
Namespace Prefix:	crpi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of Net Income (Loss) Allocated to Limited Partners

+ References

No definition available.

+ Details

Name:	crpi_PercentageOfNetIncomeLossAllocatedToLimitedPartners
Namespace Prefix:	crpi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The equity impact of cash distributions declared to a common shareholder or unit-holder by a LLC or LP.

+ References

No definition available.

+ Details

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

- Definition

The amount of cash distributions paid to a common shareholder or unit-holder by a LLC or LP.

+ References

No definition available.

+ Details

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

- Definition

Per-share or per-unit cash distributions declared to a common shareholder or unit-holder by an LLC or LP.

+ References

No definition available.

+ Details

Name:	us-gaap_DistributionMadeToMemberOrLimitedPartnerDistributionsDeclaredPerUnit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Per-share or per-unit cash distributions paid to a common shareholder or unit-holder by an LLC or LP.

+ References

No definition available.

+ Details

Name:	us-gaap_DistributionMadeToMemberOrLimitedPartnerDistributionsPaidPerUnit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

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

Partnership Profits and Losses, and Distributions (Details) (USD $)	12 Months Ended			0 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 General Partner [Member]	Jul. 26, 2010 Limited Partner [Member]	Dec. 31, 2012 Limited Partner [Member]	Dec. 31, 2012 Limited Partner [Member]	Dec. 31, 2012 Maximum [Member]
Distribution Made to Member or Limited Partner [Line Items]
Percent of profits and losses allocated to limited partners	97.00%	97.00%
Percent of profits and losses allocated to General Partners	3.00%	3.00%
Aggregate fee as a percent of gross proceeds	1.00%
Distributions allocated to Partners after aggregate fee			15.00%			85.00%
Percent of apartment property sales price fees payable shall not exceed							6.00%
Cash distribution to Limited Partners				$ 742,000
Cash distribution to Limited Partners (per Unit)				$ 30
Distribution recommended and approved					$ 5,939,280
Distribution recommended and approved (per Unit)					$ 240