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Rental Property - Acquisitions (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) ft² building	Mar. 31, 2021 USD ($) ft² building	Jun. 30, 2021 USD ($) ft² building
Business Acquisition [Line Items]
Area (in square feet)	100,100,000		100,100,000
Acquisitions 2021
Business Acquisition [Line Items]
Area (in square feet)	2,601,590		2,601,590
Number of properties | building			15
Business Combination, Consideration Transferred | $			$ 226,949
Acquistions Q1 2021
Business Acquisition [Line Items]
Area (in square feet)		1,252,323
Number of properties | building		6
Business Combination, Consideration Transferred | $		$ 100,228
Bellevue, NE, 1-21-21
Business Acquisition [Line Items]
Area (in square feet)		370,000
Number of properties | building		1
Business Combination, Consideration Transferred | $		$ 24,922
Inver Grove Heigh, MN, 2-24-21
Business Acquisition [Line Items]
Area (in square feet)		80,655
Number of properties | building		1
Business Combination, Consideration Transferred | $		$ 10,174
Ronkonkoma, NY, 2-25-21
Business Acquisition [Line Items]
Area (in square feet)		64,224
Number of properties | building		1
Business Combination, Consideration Transferred | $		$ 8,516
Sacramento, CA, 2-25-21
Business Acquisition [Line Items]
Area (in square feet)		267,284
Number of properties | building		1
Business Combination, Consideration Transferred | $		$ 25,917
Bryant, AR, 3-1-1
Business Acquisition [Line Items]
Area (in square feet)		300,160
Number of properties | building		1
Business Combination, Consideration Transferred | $		$ 24,317
Maple Heights, OH, 3-18-21
Business Acquisition [Line Items]
Area (in square feet)		170,000
Number of properties | building		1
Business Combination, Consideration Transferred | $		$ 6,382
Acquisitions Q2 2021 [Member]
Business Acquisition [Line Items]
Area (in square feet)	1,349,267		1,349,267
Number of properties | building	9
Business Combination, Consideration Transferred | $	$ 126,721
Greenwood, IN - 5-17-21
Business Acquisition [Line Items]
Area (in square feet)	154,440		154,440
Number of properties | building	1
Business Combination, Consideration Transferred | $	$ 13,655
Hunt Valley, MD, 5-17-21
Business Acquisition [Line Items]
Area (in square feet)	46,851		46,851
Number of properties | building	1
Business Combination, Consideration Transferred | $	$ 6,228
Warren, MI - 6-1-1
Business Acquisition [Line Items]
Area (in square feet)	248,040		248,040
Number of properties | building	1
Business Combination, Consideration Transferred | $	$ 23,786
Appleton, WI - 6-7-1
Business Acquisition [Line Items]
Area (in square feet)	152,000		152,000
Number of properties | building	1
Business Combination, Consideration Transferred | $	$ 7,249
Gilbert, AZ - 6-14-21
Business Acquisition [Line Items]
Area (in square feet)	41,504		41,504
Number of properties | building	1
Business Combination, Consideration Transferred | $	$ 8,670
Strongsville, OH - 6-17-21
Business Acquisition [Line Items]
Area (in square feet)	179,577		179,577
Number of properties | building	1
Business Combination, Consideration Transferred | $	$ 19,602
Fernley, NV - 6-30-21
Business Acquisition [Line Items]
Area (in square feet)	183,435		183,435
Number of properties | building	1
Business Combination, Consideration Transferred | $	$ 13,892
Hagerstown, MD - 6-30-21
Business Acquisition [Line Items]
Area (in square feet)	193,420		193,420
Number of properties | building	1
Business Combination, Consideration Transferred | $	$ 17,521
Stockton, CA - 6-30-21
Business Acquisition [Line Items]
Area (in square feet)	150,000		150,000
Number of properties | building	1
Business Combination, Consideration Transferred | $	$ 16,118

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