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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(b)(9)(a))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(b)(7)(c))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(14)(d))
-URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(3)(a))
-URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263

Name:	us-gaap_GainsLossesOnSalesOfInvestmentRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Dispositions - Assets and Liabilities Classified as Held for Sale (Details) $ in Thousands	1 Months Ended		12 Months Ended
	Jul. 31, 2018 USD ($) property	Apr. 30, 2018 USD ($)	Dec. 31, 2019 property	Dec. 31, 2018 USD ($) property	Dec. 31, 2017 USD ($)
Dispositions
Number of dispositions \| property			0	3
Gain on sale of real estate				$ 3,715	$ 2,072
Industrial Property, Redwood Falls, MN \| Disposed of by Sale
Dispositions
Property sold		$ 5,200
Gain on sale of real estate		$ 935
Retail Property, Austin, TX \| Disposed of by Sale
Dispositions
Property sold	$ 3,615
Gain on sale of real estate	$ 1,266
Office Property, Bismarck, ND \| Disposed of by Sale
Dispositions
Number of dispositions \| property	1
Property sold	$ 4,250
Gain on sale of real estate	$ 1,514
Retail Property, Fargo, ND \| Disposed of by Sale
Dispositions
Property sold					4,400
Gain on sale of real estate					$ 2,072