Real Estate Assets, Discontinued Operations and Assets Held for Sale (Aggregate Balance Sheet of Properties Held for Sale Included in Discontinued Operations) (Details) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2022 USD ($) buildings	Dec. 31, 2021 USD ($) buildings	Jan. 14, 2022 buildings
Held for Sale Assets in Continuing and Discontinued Operations
Continuing Operations, Number of In-service Properties Held for Sale \| buildings	0
Continuing Operations, Number of Real Estate Properties Sold \| buildings	4	30
Total Properties Sold or Classified as Held for Sale \| buildings	34
Equity Method Investment, Ownership Percentage	20.00%
Total assets held-for-sale	$ 0	$ 144,651
Total liabilities related to assets held-for-sale	0	6,278
Continuing Operations [Member]
Held for Sale Assets in Continuing and Discontinued Operations
Land and improvements	0	67,818
Buildings and tenant improvements	0	102,867
Accumulated depreciation	0	(36,785)
Deferred leasing and other costs, net	0	5,392
Other assets	0	5,359
Total assets held-for-sale	0	144,651
Accrued expenses	0	43
Other liabilities	0	6,235
Total liabilities related to assets held-for-sale	$ 0	$ 6,278
Tranche 3
Held for Sale Assets in Continuing and Discontinued Operations
Number of Real Estate Properties \| buildings			3

Accrued Expenses Held-for-Sale

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Accumulated Depreciation of Assets Held-for-Sale

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Buildings and Tenant Improvements Held-for-Sale

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Continuing Operations, Number of In-service Properties Held for Sale

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Continuing Operations, Number of Real Estate Properties Sold

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Land and Land Improvements Held-for-Sale

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- Definition

This element represents the following, for assets held for sale, all net of accumulated amortization: (i) the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property; (ii) costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that result directly from and are essential to acquire that lease and 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; (iii) the identifiable intangible asset established upon acquisition based on a favorable difference between the terms of an acquired lease and the current market terms for that lease at the acquisition date.

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Other Liabilities Held-for-Sale

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Total Properties Sold or Classified as Held for Sale

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Amount classified as assets attributable to disposal group held for sale or disposed of.

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Amount classified as other assets attributable to disposal group held for sale or disposed of.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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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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Amount classified as liabilities attributable to disposal group held for sale or disposed of.

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The number of real estate properties owned as of the balance sheet date.

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