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Tenant Leases (Details) (USD $)
In Thousands, unless otherwise specified |
9 Months Ended |
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Sep. 30, 2012
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| Property Subject to or Available for Operating Lease [Line Items] | |
| October 1 through December 31, 2012 | 146,372 |
| 2013 | 555,291 |
| 2014 | 489,914 |
| 2015 | 420,352 |
| 2016 | 370,374 |
| 2017 and thereafter | 1,438,568 |
| Total | 3,420,871 |
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Tenant Leases [Member]
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| Property Subject to or Available for Operating Lease [Line Items] | |
| Operating leases with various expiration dates through year | Mar. 31, 2033 |
| X | ||||||||||
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- Definition
Date which lease or group of leases is set to expire, in CCYY-MM-DD format. No definition available.
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| X | ||||||||||
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- Definition
Future minimum rental payments in aggregate as of the balance sheet date under operating leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Future rental payments receivable within one year of the balance sheet date under an operating lease. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Future rental payments receivable within the fifth year from the balance sheet date under an operating lease. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Future rental payments receivable within the fourth year from the balance sheet date under an operating lease. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Future rental payments receivable within the third year from the balance sheet date under an operating lease. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Future rental payments receivable within the second year from the balance sheet date under an operating lease. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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