Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Discontinued operations
Provision for loss on a property held for sale net of applicable income tax			$ 14,300	$ (21,939)
Assets held for sale
Land	135,845		135,845		132,393
Building	1,051,111		1,051,111		1,006,267
Furniture & Fixtures	904		904		831
Total real estate assets, gross	1,187,860		1,187,860		1,139,491
Less accumulated depreciation	171,876		171,876		148,266
Real estate assets, net	1,015,984		1,015,984		991,225
Straight-line rent receivable	34,190		34,190		28,502
Deferred leasing comissions, net of accumulated amortization of $200	21,702		21,702		22,325
Deferred leasing commissions, accumulated amortization	11,489		11,489		9,139
Assets held for sale	685		685		15,355
Operating results for the asset held for sale
Rental revenue	38,251	33,398	110,124	97,494
Related party revenue:
Rental operating expenses	(9,639)	(8,889)	(26,940)	(25,590)
Real estate taxes and insurance	(5,764)	(4,950)	(16,952)	(14,757)
Selling, general and administrative	(3,141)	(1,654)	(7,454)	(4,901)
Depreciation and amortization	(13,572)	(12,183)	(39,647)	(34,671)
Interest income	5	3	17	19
Net income (loss) from discontinued operations	(271)	(542)	(856)	2,797
Discontinued operations
Discontinued operations
Expected term for sale of property	1 year
Provision for loss on a property held for sale net of applicable income tax	14,300
Assets held for sale
Land	5,110		5,110		5,110
Building	14,199		14,199		14,182
Furniture & Fixtures	25		25		25
Total real estate assets, gross	19,334		19,334		19,317
Less accumulated depreciation	19,011		19,011		4,321
Real estate assets, net	323		323		14,996
Straight-line rent receivable	86		86		43
Deferred leasing comissions, net of accumulated amortization of $200	276		276		316
Deferred leasing commissions, accumulated amortization	200		200		200
Assets held for sale	685		685		15,355
Operating results for the asset held for sale
Rental revenue	255	273	879	1,571
Related party revenue:
Syndication fees		532		4,022
Transaction fees		470		3,846
Rental operating expenses	(284)	(437)	(888)	(1,237)
Real estate taxes and insurance	(71)	(71)	(271)	(306)
Selling, general and administrative		(758)		(2,276)
Commissions		(349)		(2,192)
Depreciation and amortization	(171)	(206)	(576)	(640)
Interest income		4		9
Net income (loss) from discontinued operations	$ (271)	$ (542)	$ (856)	$ 2,797

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Syndication fees from the sale of securities in Sponsored REITs are generally recognized upon an investor closing.

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Transaction fees relating to loan commitment fees and acquisition fees are recognized upon an investor closing and the subsequent payment of the Sponsored REIT's loan. Development fees are recognized upon an investor closing and once the service has been provided. Fees related to organizational, offering and other expenditures are recognized upon the final investor closing of the Sponsored REIT.

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For an unclassified balance sheet, the accumulated amortization, as of the reporting date, which represents the periodic charge to earnings of initial direct costs which have been deferred and are being allocated over the lease term in proportion to the recognition of rental income.

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This element represents costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction. This element is net of accumulated amortization.

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The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property, by the lessor or lessee, respectively. Such receivable is reduced by allowances attributable to, for instance, credit risk associated with a lessee.

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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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After tax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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Gross amount of fixtures and equipment as of the date of the statement of financial position. Fixtures may include and consist of: machinery, equipment, engines, boilers, incinerators, installed building materials; systems and equipment for the purpose of supplying or distributing heating, cooling, electricity, gas, water, air, or light; antennas, cable, wiring and conduits used in connection with radio, television, security, fire prevention, or fire detection or otherwise used to carry electronic signals; telephone systems and equipment; elevators and related machinery and equipment; fire detection, prevention and extinguishing systems and apparatus; security and access control systems and apparatus; plumbing systems; water heaters, ranges, stoves, microwave ovens, refrigerators, dishwashers, garbage disposers, washers, dryers and other appliances; light fixtures, awnings, storm windows and storm doors; pictures, screens, blinds, shades, curtains and curtain rods; mirrors; cabinets, paneling, rugs and floor and wall coverings; fences, trees and plants; swimming pools; and such other items as defined by the reporting entity.

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The net gain (loss) resulting from the sale, transfer, termination, or other disposition of assets during the period, excluding transactions involving capital leases, assets-held- or available-for-lease, and other real estate owned which, to the extent appropriate, are included in gains (losses) on the disposition of assets in nonoperating income (expense).

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Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements.

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Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money.

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Carrying amount as of the balance sheet date of real estate held for productive use. This excludes land held for sale.

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The cumulative amount of depreciation for real estate property held for investment purposes.

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Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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

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The aggregate total of real estate taxes and insurance expense.

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Primarily represents commissions incurred in the period based upon the sale by commissioned employees or third parties of the entity's goods or services, and fees for sales assistance or product enhancements performed by third parties (such as a distributor or value added reseller).

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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