Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Apr. 16, 2018	Mar. 31, 2018	Mar. 31, 2017	Apr. 30, 2018
Subsequent Events
Dividend or distribution paid		$ 0.254375	$ 0.2475
Acquisition price			$ 8,809
Subsequent Event
Subsequent Events
Dividend or distribution paid	$ 0.254375
Operating Partnership \| Subsequent Event \| Contract to Sell Property, Redwood Falls, MN [Member]
Subsequent Events
Sales price				$ 5,200