Segment Disclosure - Comparison of Net operating Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting, Asset Reconciling Item [Line Items]
Rental	$ 37,980	$ 32,476	$ 109,866	$ 87,167
Tenant Reimbursements	9,167	7,313	25,566	19,929
Total Revenues	47,147	39,789	135,432	107,096
Property and Related Expenses:
Operating and Maintenance	4,373	4,311	14,314	11,959
General and Administrative	7,541	1,474	11,974	4,264
Property Management Fee to Related Party	396	511	1,168	1,096
Property Taxes	6,752	4,624	17,538	13,359
Total Expenses	58,889	43,556	153,706	126,940
Net Operating Income	35,247	30,041	101,411	79,804
Domestic Industrial Properties Continuing Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Rental	11,880	8,344	31,646	22,455
Tenant Reimbursements	2,077	1,748	6,994	5,091
Total Revenues	13,957	10,092	38,640	27,546
Property and Related Expenses:
Operating and Maintenance	529	432	1,781	1,366
General and Administrative	234	179	505	503
Property Management Fee to Related Party	79	68	238	205
Property Taxes	2,086	1,612	6,127	4,824
Total Expenses	2,928	2,291	8,651	6,898
Net Operating Income	11,029	7,801	29,989	20,648
Domestic Office Properties Continuing Operations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Rental	24,230	22,415	72,862	59,861
Tenant Reimbursements	6,996	5,481	18,314	14,620
Total Revenues	31,226	27,896	91,176	74,481
Property and Related Expenses:
Operating and Maintenance	3,750	3,704	12,243	10,060
General and Administrative	78	16	277	194
Property Management Fee to Related Party	234	213	695	515
Property Taxes	4,666	3,012	11,411	8,535
Total Expenses	8,728	6,945	24,626	19,304
Net Operating Income	22,498	20,951	66,550	55,177
International Office/Retail Properties [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Rental	1,870	1,717	5,358	4,851
Tenant Reimbursements	94	84	258	218
Total Revenues	1,964	1,801	5,616	5,069
Property and Related Expenses:
Operating and Maintenance	94	175	290	533
General and Administrative	67	107	219	181
Property Management Fee to Related Party	83	230	235	376
Total Expenses	244	512	744	1,090
Net Operating Income	$ 1,720	$ 1,289	$ 4,872	$ 3,979

Property management fee to related party.

No definition available.

Name:	ck0001297587_PropertyManagementFeeToRelatedParty
Namespace Prefix:	ck0001297587_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

+ Details

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

- Definition

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense.

+ References

No definition available.

+ Details

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

- Definition

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

+ References

No definition available.

+ Details

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

- Details

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

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

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

- Definition

The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 19

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39896-112707

+ Details

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

- Definition

The aggregate revenue from real estate operations during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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

- Definition

A tax based on the assessed value of real estate by the local government. The tax is usually based on the value of property (including the land).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 720

-SubTopic 30

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6419918&loc=d3e35301-107843

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 2, 17

-Chapter 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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

- Details

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

- Definition

In accordance with the provisions of their lease agreement, this element represents allowable charges due a landlord from its tenant. In retail store and office building leases, for example, tenant reimbursements may cover items such as taxes, utilities, and common area expenses.

+ References

+ Details

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