Minimum Future Rents Receivable - Schedule of Minimum Future Rentals to be Received on Non-cancelable Operating Leases (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
Future Contractual Minimum Rental Revenues On Leases [Line Items]
2012 (Three months ending December 31, 2012)	$ 36,166
2013	137,126
2014	132,351
2015	124,266
2016	111,369
2017	104,747
Thereafter	406,310
Total	$ 1,052,335

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Operating leases future minimum payments receivable in six years.

+ References

No definition available.

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- Definition

Operating leases future minimum payments receivable six year thereafter.

+ References

No definition available.

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- Definition

Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6454179&loc=d3e41551-112718

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 23

-Subparagraph b(ii)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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- Definition

Future rental payments receivable within one year of the balance sheet date under an operating lease.

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- Definition

Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

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- Definition

Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.

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- Definition

Future rental payments receivable within the third year from the balance sheet date under an operating lease.

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- Definition

Future rental payments receivable within the second year from the balance sheet date under an operating lease.

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