Discontinued Operations, Gain (Loss) on Debt Extinguishment on Sale of Properties, Net

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Mortgage Loans on Real Estate, Amount in Excess of Fair Value

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Number of Real Estate Properties, Held For Sale

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Real Estate, Number of Properties Sold

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Gross amount of debt extinguished.

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- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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Impairment losses measured as the amount by which the carrying amount of the business or real estate partnerships exceeds the fair value of the business or partnership.

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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 charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth.

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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Dispositions and Impairment - Additional Information (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2017 USD ($)	Sep. 30, 2018 USD ($) property	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) building property	Sep. 30, 2017 USD ($) Property	Dec. 31, 2017 property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on debt extinguishment on sale of properties, net				$ (1,698)	$ 2,381
Debt satisfaction amount					3,496
Number of real estate properties held for sale \| property		6		6		1
Real estate impairment charges				$ 90,860	38,283
Asset impairment charges		$ 2,542	$ 21,986	90,860	43,577
Impairment losses related to real estate partnerships	$ 5,294
Overland Park, Kansas [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment charges				17,906
Kansas City, Missouri [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment charges				5,591
Memphis, Tennessee [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment charges				25,585
Overland Park, Kansas and Kansas City, Missouri [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amount in excess of fair value		25,060		25,060
Overland Park, Kansas and Kansas City, Missouri [Member] \| Mortgages [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Mortgages and notes payable		47,685		47,685
Office Building [Member] \| Cash Held in Exchange Account [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restricted cash held in exchange account		256,808		256,808
Transferred Property [Member] \| Office Building [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate gross disposition price				967,799	190,368
Transferred Property [Member] \| Office Building [Member] \| NNN Office Joint Venture Properties [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate gross disposition price				$ 725,800
Number of properties sold \| building				21
Sold Properties [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of properties				$ 239,577	55,078
LCIF [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment charges		0	$ 6,802	23,938	$ 12,061
LCIF [Member] \| Overland Park, Kansas [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset impairment charges				17,906
Amount in excess of fair value		19,072		19,072
LCIF [Member] \| Overland Park, Kansas [Member] \| Mortgages [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Mortgages and notes payable		$ 32,297		$ 32,297
LCIF [Member] \| Office Building [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold \| Property					2