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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Transactions (Dispositions Narrative) (Details) - USD ($) $ in Thousands						3 Months Ended
	Mar. 31, 2020	Jan. 19, 2020	Jan. 16, 2020	Sep. 26, 2019	Apr. 15, 2019	Dec. 31, 2019	Sep. 30, 2019
Credit Facilities \| Revolving Credit Facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Repayment of debt							$ 46,000
Disposed of by Sale \| Pasadena Corporate Park
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration transferred	$ 78,000
Gain (loss) on sale	$ (83)
Impairment loss on real estate assets						$ 20,600
Disposed of by Sale \| Cranberry Woods Drive
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration transferred		$ 180,000	$ 180,000
Gain (loss) on sale		$ 13,400	$ 13,428
Disposed of by Sale \| Lindbergh Center
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration transferred				$ 187,000
Gain (loss) on sale				$ 0
Impairment loss on real estate assets							$ 23,400
Disposed of by Sale \| One & Three Glenlake Parkway
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration transferred					$ 227,500
Gain (loss) on sale					42,030
Adjustments for tenant improvements and rent abatements					$ 33,600