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Real Estate - Schedule of Real Estate Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Real Estate Properties [Line Items] |  |
Land, at cost | $ 407,970 | $ 470,339
Buildings and improvements, at cost | 1,465,672 | 1,605,994
Less: accumulated depreciation | (252,638) | (305,314)
Real estate, net | 1,621,004 | 1,771,019
Real estate available and held for sale | 253,336 | 22,551
Total real estate | 1,874,340 | 1,793,570
Net Lease |  |
Real Estate Properties [Line Items] |  |
Land, at cost | 302,199 | 336,740
Buildings and improvements, at cost | 1,389,332 | 1,487,270
Less: accumulated depreciation | (241,686) | (287,516)
Real estate, net | 1,449,845 | 1,536,494
Real estate available and held for sale | 219,184 | 1,055
Total real estate | 1,669,029 | 1,537,549
Operating Properties |  |
Real Estate Properties [Line Items] |  |
Land, at cost | 105,771 | 133,599
Buildings and improvements, at cost | 76,340 | 118,724
Less: accumulated depreciation | (10,952) | (17,798)
Real estate, net | 171,159 | 234,525
Real estate available and held for sale | 34,152 | 21,496
Total real estate | 205,311 | 256,021
Residential Condominiums |  |
Real Estate Properties [Line Items] |  |
Real estate available and held for sale | $ 16,100 | $ 20,600

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- Definition Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount before accumulated depletion of real estate held for productive use, excluding land held for sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6812-107765 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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