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Income Taxes Policy (Details) (Subsequent Event)	6 Months Ended
	Dec. 31, 2014
Subsequent Event [Line Items]
Percent Of REIT Taxable Income To Be Distributed	90.00%
Nondeductible Excise Tax Rate	4.00%
Maximum
Subsequent Event [Line Items]
Percent Of REIT Taxable Income To Be Distributed	100.00%

X

- Definition

Nondeductible Excise Tax Rate

+ References

No definition available.

+ Details

Name:	cbso_NondeductibleExciseTaxRate
Namespace Prefix:	cbso_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percent Of REIT Taxable Income To Be Distributed

+ References

No definition available.

+ Details

Name:	cbso_PercentOfREITTaxableIncomeToBeDistributed
Namespace Prefix:	cbso_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

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