Real Estate and Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 917,084
Buildings & Improvements, Initial Cost	3,103,632
Improvements, Initial Cost	0
Land, Total Cost	962,958
Buildings & Improvements, Total Cost	4,026,430
Total Cost	4,989,388	$ 4,709,812	$ 4,627,866
Accumulated Depreciation	1,427,057
Total Cost, Net of Accumulated Depreciation	3,562,331
Encumbrances	248,917
The changes in Total Real Estate Assets for the three years ended December 31, are as follows:
Balance at beginning of year	4,709,812	4,627,866	8,248,003
Acquisitions	242,593	80,771	34,675
Developments, improvements and expansions	59,126	109,830	120,325
Adjustments of property carrying values (Impairments)	(5,200)	(3,370)	(56,317)
Disposals(A)	(16,943)	(105,285)	(998,776)
Spin-off of RVI	0	0	(2,720,044)
Balance at end of year	4,989,388	4,709,812	4,627,866
The changes in Accumulated Depreciation and Amortization for the three years ended December 31, are as follows:
Balance at beginning of year	1,289,148	1,172,357	1,953,479
Depreciation for year	154,906	147,372	207,902
Disposals	(16,997)	(30,581)	(268,405)
Spin-off of RVI	0	0	(720,619)
Balance at end of year	1,427,057	$ 1,289,148	$ 1,172,357
Phoenix, AZ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	18,701
Buildings & Improvements, Initial Cost	18,929
Improvements, Initial Cost	0
Land, Total Cost	18,701
Buildings & Improvements, Total Cost	24,448
Total Cost	43,149
Accumulated Depreciation	11,036
Total Cost, Net of Accumulated Depreciation	32,113
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	1999
Phoenix, AZ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 15,352
Buildings & Improvements, Initial Cost	24,414
Improvements, Initial Cost	0
Land, Total Cost	15,352
Buildings & Improvements, Total Cost	29,491
Total Cost	44,843
Accumulated Depreciation	18,365
Total Cost, Net of Accumulated Depreciation	26,478
Encumbrances	$ 28,063
Date of Construction (C) Acquisition (A)	2003
Phoenix, AZ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 15,090
Buildings & Improvements, Initial Cost	36,880
Improvements, Initial Cost	0
Land, Total Cost	18,399
Buildings & Improvements, Total Cost	42,438
Total Cost	60,837
Accumulated Depreciation	13,714
Total Cost, Net of Accumulated Depreciation	47,123
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2012
Buena Park, CA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 27,269
Buildings & Improvements, Initial Cost	21,427
Improvements, Initial Cost	0
Land, Total Cost	27,269
Buildings & Improvements, Total Cost	27,076
Total Cost	54,345
Accumulated Depreciation	5,107
Total Cost, Net of Accumulated Depreciation	49,238
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2015
Fontana, CA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 23,861
Buildings & Improvements, Initial Cost	57,931
Improvements, Initial Cost	0
Land, Total Cost	23,861
Buildings & Improvements, Total Cost	61,965
Total Cost	85,826
Accumulated Depreciation	13,683
Total Cost, Net of Accumulated Depreciation	72,143
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2014
Long Beach, CA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 0
Buildings & Improvements, Initial Cost	147,918
Improvements, Initial Cost	0
Land, Total Cost	0
Buildings & Improvements, Total Cost	197,297
Total Cost	197,297
Accumulated Depreciation	96,259
Total Cost, Net of Accumulated Depreciation	101,038
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2005
Oakland, CA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 4,361
Buildings & Improvements, Initial Cost	33,538
Improvements, Initial Cost	0
Land, Total Cost	4,361
Buildings & Improvements, Total Cost	33,538
Total Cost	37,899
Accumulated Depreciation	8,524
Total Cost, Net of Accumulated Depreciation	29,375
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Roseville, CA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 23,574
Buildings & Improvements, Initial Cost	67,031
Improvements, Initial Cost	0
Land, Total Cost	23,574
Buildings & Improvements, Total Cost	68,104
Total Cost	91,678
Accumulated Depreciation	14,869
Total Cost, Net of Accumulated Depreciation	76,809
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2014
San Francisco, CA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 10,464
Buildings & Improvements, Initial Cost	25,730
Improvements, Initial Cost	0
Land, Total Cost	10,464
Buildings & Improvements, Total Cost	26,093
Total Cost	36,557
Accumulated Depreciation	13,845
Total Cost, Net of Accumulated Depreciation	22,712
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2002
Centennial, CO [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 7,833
Buildings & Improvements, Initial Cost	35,550
Improvements, Initial Cost	0
Land, Total Cost	9,075
Buildings & Improvements, Total Cost	68,589
Total Cost	77,664
Accumulated Depreciation	44,712
Total Cost, Net of Accumulated Depreciation	32,952
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	1997
Colorado Springs, CO [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 9,001
Buildings & Improvements, Initial Cost	47,671
Improvements, Initial Cost	0
Land, Total Cost	9,001
Buildings & Improvements, Total Cost	56,897
Total Cost	65,898
Accumulated Depreciation	16,255
Total Cost, Net of Accumulated Depreciation	49,643
Encumbrances	$ 15,350
Date of Construction (C) Acquisition (A)	2011
Denver, CO [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 20,733
Buildings & Improvements, Initial Cost	22,818
Improvements, Initial Cost	0
Land, Total Cost	20,804
Buildings & Improvements, Total Cost	29,015
Total Cost	49,819
Accumulated Depreciation	16,595
Total Cost, Net of Accumulated Depreciation	33,224
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2003
Parker, CO [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 4,632
Buildings & Improvements, Initial Cost	38,256
Improvements, Initial Cost	0
Land, Total Cost	4,632
Buildings & Improvements, Total Cost	41,682
Total Cost	46,314
Accumulated Depreciation	9,471
Total Cost, Net of Accumulated Depreciation	36,843
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Guilford, CT [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 4,588
Buildings & Improvements, Initial Cost	41,892
Improvements, Initial Cost	0
Land, Total Cost	6,457
Buildings & Improvements, Total Cost	64,349
Total Cost	70,806
Accumulated Depreciation	9,946
Total Cost, Net of Accumulated Depreciation	60,860
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2015
Windsor Court, CT [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 6,090
Buildings & Improvements, Initial Cost	11,745
Improvements, Initial Cost	0
Land, Total Cost	6,090
Buildings & Improvements, Total Cost	12,565
Total Cost	18,655
Accumulated Depreciation	5,656
Total Cost, Net of Accumulated Depreciation	12,999
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2007
Brandon, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 0
Buildings & Improvements, Initial Cost	4,111
Improvements, Initial Cost	0
Land, Total Cost	0
Buildings & Improvements, Total Cost	24,362
Total Cost	24,362
Accumulated Depreciation	2,901
Total Cost, Net of Accumulated Depreciation	21,461
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	1972
Brandon, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 4,775
Buildings & Improvements, Initial Cost	13,117
Improvements, Initial Cost	0
Land, Total Cost	4,775
Buildings & Improvements, Total Cost	19,287
Total Cost	24,062
Accumulated Depreciation	7,654
Total Cost, Net of Accumulated Depreciation	16,408
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2009
Brandon, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 2,938
Buildings & Improvements, Initial Cost	13,685
Improvements, Initial Cost	0
Land, Total Cost	2,938
Buildings & Improvements, Total Cost	14,184
Total Cost	17,122
Accumulated Depreciation	3,774
Total Cost, Net of Accumulated Depreciation	13,348
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Jupiter, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 8,764
Buildings & Improvements, Initial Cost	20,051
Improvements, Initial Cost	0
Land, Total Cost	8,764
Buildings & Improvements, Total Cost	20,051
Total Cost	28,815
Accumulated Depreciation	169
Total Cost, Net of Accumulated Depreciation	28,646
Encumbrances	$ 13,018
Date of Construction (C) Acquisition (A)	2020
Melbourne, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 3,111
Buildings & Improvements, Initial Cost	7,325
Improvements, Initial Cost	0
Land, Total Cost	3,111
Buildings & Improvements, Total Cost	11,301
Total Cost	14,412
Accumulated Depreciation	679
Total Cost, Net of Accumulated Depreciation	13,733
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2018
Miami, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 11,626
Buildings & Improvements, Initial Cost	30,457
Improvements, Initial Cost	0
Land, Total Cost	26,743
Buildings & Improvements, Total Cost	121,150
Total Cost	147,893
Accumulated Depreciation	51,032
Total Cost, Net of Accumulated Depreciation	96,861
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2006
Naples, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 10,172
Buildings & Improvements, Initial Cost	39,342
Improvements, Initial Cost	0
Land, Total Cost	10,172
Buildings & Improvements, Total Cost	43,351
Total Cost	53,523
Accumulated Depreciation	9,797
Total Cost, Net of Accumulated Depreciation	43,726
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Orlando, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 8,528
Buildings & Improvements, Initial Cost	56,684
Improvements, Initial Cost	0
Land, Total Cost	13,057
Buildings & Improvements, Total Cost	82,090
Total Cost	95,147
Accumulated Depreciation	11,414
Total Cost, Net of Accumulated Depreciation	83,733
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2016
Orlando, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 9,451
Buildings & Improvements, Initial Cost	16,424
Improvements, Initial Cost	0
Land, Total Cost	9,451
Buildings & Improvements, Total Cost	16,424
Total Cost	25,875
Accumulated Depreciation	151
Total Cost, Net of Accumulated Depreciation	25,724
Encumbrances	$ 20,571
Date of Construction (C) Acquisition (A)	2020
Palm Harbor, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 1,137
Buildings & Improvements, Initial Cost	4,089
Improvements, Initial Cost	0
Land, Total Cost	1,137
Buildings & Improvements, Total Cost	5,268
Total Cost	6,405
Accumulated Depreciation	4,089
Total Cost, Net of Accumulated Depreciation	2,316
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	1995
Plantation, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 21,729
Buildings & Improvements, Initial Cost	37,331
Improvements, Initial Cost	0
Land, Total Cost	22,112
Buildings & Improvements, Total Cost	96,242
Total Cost	118,354
Accumulated Depreciation	47,338
Total Cost, Net of Accumulated Depreciation	71,016
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2007
Tampa, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 10,000
Buildings & Improvements, Initial Cost	10,907
Improvements, Initial Cost	0
Land, Total Cost	10,000
Buildings & Improvements, Total Cost	11,066
Total Cost	21,066
Accumulated Depreciation	452
Total Cost, Net of Accumulated Depreciation	20,614
Encumbrances	$ 9,100
Date of Construction (C) Acquisition (A)	2019
Winter Garden, FL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 38,945
Buildings & Improvements, Initial Cost	130,382
Improvements, Initial Cost	0
Land, Total Cost	38,945
Buildings & Improvements, Total Cost	139,048
Total Cost	177,993
Accumulated Depreciation	35,769
Total Cost, Net of Accumulated Depreciation	142,224
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Atlanta, GA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 14,078
Buildings & Improvements, Initial Cost	41,050
Improvements, Initial Cost	0
Land, Total Cost	14,078
Buildings & Improvements, Total Cost	48,089
Total Cost	62,167
Accumulated Depreciation	17,120
Total Cost, Net of Accumulated Depreciation	45,047
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2009
Cumming, GA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 14,249
Buildings & Improvements, Initial Cost	23,653
Improvements, Initial Cost	0
Land, Total Cost	14,249
Buildings & Improvements, Total Cost	28,570
Total Cost	42,819
Accumulated Depreciation	15,509
Total Cost, Net of Accumulated Depreciation	27,310
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2003
Cumming, GA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 6,851
Buildings & Improvements, Initial Cost	49,659
Improvements, Initial Cost	0
Land, Total Cost	6,851
Buildings & Improvements, Total Cost	50,527
Total Cost	57,378
Accumulated Depreciation	13,292
Total Cost, Net of Accumulated Depreciation	44,086
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Cumming, GA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 3,391
Buildings & Improvements, Initial Cost	8,218
Improvements, Initial Cost	0
Land, Total Cost	3,391
Buildings & Improvements, Total Cost	8,590
Total Cost	11,981
Accumulated Depreciation	768
Total Cost, Net of Accumulated Depreciation	11,213
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2018
Douglasville, GA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 2,839
Buildings & Improvements, Initial Cost	5,511
Improvements, Initial Cost	0
Land, Total Cost	2,839
Buildings & Improvements, Total Cost	7,055
Total Cost	9,894
Accumulated Depreciation	676
Total Cost, Net of Accumulated Depreciation	9,218
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2018
Roswell, GA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 6,566
Buildings & Improvements, Initial Cost	15,005
Improvements, Initial Cost	0
Land, Total Cost	7,894
Buildings & Improvements, Total Cost	27,692
Total Cost	35,586
Accumulated Depreciation	12,445
Total Cost, Net of Accumulated Depreciation	23,141
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2007
Snellville, GA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 10,185
Buildings & Improvements, Initial Cost	51,815
Improvements, Initial Cost	0
Land, Total Cost	10,342
Buildings & Improvements, Total Cost	58,840
Total Cost	69,182
Accumulated Depreciation	27,041
Total Cost, Net of Accumulated Depreciation	42,141
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2007
Suwanee, GA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 13,479
Buildings & Improvements, Initial Cost	23,923
Improvements, Initial Cost	0
Land, Total Cost	13,335
Buildings & Improvements, Total Cost	34,556
Total Cost	47,891
Accumulated Depreciation	18,436
Total Cost, Net of Accumulated Depreciation	29,455
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2003
Chicago, IL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 22,642
Buildings & Improvements, Initial Cost	82,754
Improvements, Initial Cost	0
Land, Total Cost	22,642
Buildings & Improvements, Total Cost	83,263
Total Cost	105,905
Accumulated Depreciation	18,545
Total Cost, Net of Accumulated Depreciation	87,360
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2014
Chicago, IL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 23,588
Buildings & Improvements, Initial Cost	45,632
Improvements, Initial Cost	0
Land, Total Cost	23,588
Buildings & Improvements, Total Cost	45,951
Total Cost	69,539
Accumulated Depreciation	6,864
Total Cost, Net of Accumulated Depreciation	62,675
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2017
Schaumburg, IL [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 27,466
Buildings & Improvements, Initial Cost	84,679
Improvements, Initial Cost	0
Land, Total Cost	27,466
Buildings & Improvements, Total Cost	99,185
Total Cost	126,651
Accumulated Depreciation	23,123
Total Cost, Net of Accumulated Depreciation	103,528
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Merriam, KS [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 15,043
Buildings & Improvements, Initial Cost	55,028
Improvements, Initial Cost	0
Land, Total Cost	13,623
Buildings & Improvements, Total Cost	54,306
Total Cost	67,929
Accumulated Depreciation	13,358
Total Cost, Net of Accumulated Depreciation	54,571
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Everett, MA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 9,311
Buildings & Improvements, Initial Cost	44,647
Improvements, Initial Cost	0
Land, Total Cost	9,462
Buildings & Improvements, Total Cost	60,289
Total Cost	69,751
Accumulated Depreciation	34,598
Total Cost, Net of Accumulated Depreciation	35,153
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2001
Framingham, MA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 75,675
Buildings & Improvements, Initial Cost	191,594
Improvements, Initial Cost	0
Land, Total Cost	75,675
Buildings & Improvements, Total Cost	200,091
Total Cost	275,766
Accumulated Depreciation	48,974
Total Cost, Net of Accumulated Depreciation	226,792
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Brentwood, MO [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 10,018
Buildings & Improvements, Initial Cost	32,053
Improvements, Initial Cost	0
Land, Total Cost	10,018
Buildings & Improvements, Total Cost	40,921
Total Cost	50,939
Accumulated Depreciation	24,453
Total Cost, Net of Accumulated Depreciation	26,486
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	1998
East Hanover, NJ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 3,847
Buildings & Improvements, Initial Cost	23,798
Improvements, Initial Cost	0
Land, Total Cost	3,847
Buildings & Improvements, Total Cost	29,481
Total Cost	33,328
Accumulated Depreciation	12,543
Total Cost, Net of Accumulated Depreciation	20,785
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2007
Edgewater, NJ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 7,714
Buildings & Improvements, Initial Cost	30,473
Improvements, Initial Cost	0
Land, Total Cost	7,714
Buildings & Improvements, Total Cost	37,806
Total Cost	45,520
Accumulated Depreciation	14,235
Total Cost, Net of Accumulated Depreciation	31,285
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2007
Freehold, NJ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 2,460
Buildings & Improvements, Initial Cost	2,475
Improvements, Initial Cost	0
Land, Total Cost	3,166
Buildings & Improvements, Total Cost	3,739
Total Cost	6,905
Accumulated Depreciation	1,414
Total Cost, Net of Accumulated Depreciation	5,491
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2005
Hamilton, NJ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 8,039
Buildings & Improvements, Initial Cost	49,896
Improvements, Initial Cost	0
Land, Total Cost	11,774
Buildings & Improvements, Total Cost	91,829
Total Cost	103,603
Accumulated Depreciation	46,877
Total Cost, Net of Accumulated Depreciation	56,726
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2003
Voorhees, NJ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 1,350
Buildings & Improvements, Initial Cost	1,837
Improvements, Initial Cost	0
Land, Total Cost	1,350
Buildings & Improvements, Total Cost	1,837
Total Cost	3,187
Accumulated Depreciation	19
Total Cost, Net of Accumulated Depreciation	3,168
Encumbrances	$ 5,412
Date of Construction (C) Acquisition (A)	2020
Princeton, NJ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 13,448
Buildings & Improvements, Initial Cost	74,249
Improvements, Initial Cost	0
Land, Total Cost	14,455
Buildings & Improvements, Total Cost	114,631
Total Cost	129,086
Accumulated Depreciation	67,501
Total Cost, Net of Accumulated Depreciation	61,585
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	1997
West Long Branch, NJ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 14,131
Buildings & Improvements, Initial Cost	51,982
Improvements, Initial Cost	0
Land, Total Cost	14,131
Buildings & Improvements, Total Cost	80,166
Total Cost	94,297
Accumulated Depreciation	37,201
Total Cost, Net of Accumulated Depreciation	57,096
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2004
Hempstead, NY [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 26,487
Buildings & Improvements, Initial Cost	14,418
Improvements, Initial Cost	0
Land, Total Cost	26,487
Buildings & Improvements, Total Cost	14,418
Total Cost	40,905
Accumulated Depreciation	137
Total Cost, Net of Accumulated Depreciation	40,768
Encumbrances	$ 27,969
Date of Construction (C) Acquisition (A)	2020
Charlotte, NC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 27,707
Buildings & Improvements, Initial Cost	45,021
Improvements, Initial Cost	0
Land, Total Cost	27,707
Buildings & Improvements, Total Cost	51,482
Total Cost	79,189
Accumulated Depreciation	16,952
Total Cost, Net of Accumulated Depreciation	62,237
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2011
Charlotte, NC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 11,224
Buildings & Improvements, Initial Cost	82,124
Improvements, Initial Cost	0
Land, Total Cost	11,224
Buildings & Improvements, Total Cost	97,609
Total Cost	108,833
Accumulated Depreciation	26,731
Total Cost, Net of Accumulated Depreciation	82,102
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2012
Charlotte, NC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 3,600
Buildings & Improvements, Initial Cost	30,392
Improvements, Initial Cost	0
Land, Total Cost	8,463
Buildings & Improvements, Total Cost	55,027
Total Cost	63,490
Accumulated Depreciation	10,951
Total Cost, Net of Accumulated Depreciation	52,539
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Cornelius, NC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 4,382
Buildings & Improvements, Initial Cost	15,184
Improvements, Initial Cost	0
Land, Total Cost	4,382
Buildings & Improvements, Total Cost	21,388
Total Cost	25,770
Accumulated Depreciation	10,720
Total Cost, Net of Accumulated Depreciation	15,050
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2007
Cincinnati, OH [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 19,572
Buildings & Improvements, Initial Cost	54,495
Improvements, Initial Cost	0
Land, Total Cost	19,572
Buildings & Improvements, Total Cost	77,258
Total Cost	96,830
Accumulated Depreciation	16,023
Total Cost, Net of Accumulated Depreciation	80,807
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2014
Columbus, OH [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 12,922
Buildings & Improvements, Initial Cost	46,006
Improvements, Initial Cost	0
Land, Total Cost	14,078
Buildings & Improvements, Total Cost	72,798
Total Cost	86,876
Accumulated Depreciation	46,064
Total Cost, Net of Accumulated Depreciation	40,812
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	1998
Columbus, OH [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 18,716
Buildings & Improvements, Initial Cost	64,617
Improvements, Initial Cost	0
Land, Total Cost	20,666
Buildings & Improvements, Total Cost	71,904
Total Cost	92,570
Accumulated Depreciation	21,662
Total Cost, Net of Accumulated Depreciation	70,908
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2011
Dublin, OH [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 3,609
Buildings & Improvements, Initial Cost	11,546
Improvements, Initial Cost	0
Land, Total Cost	3,609
Buildings & Improvements, Total Cost	15,822
Total Cost	19,431
Accumulated Depreciation	10,749
Total Cost, Net of Accumulated Depreciation	8,682
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	1998
Mason, OH [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 2,032
Buildings & Improvements, Initial Cost	23,788
Improvements, Initial Cost	0
Land, Total Cost	2,032
Buildings & Improvements, Total Cost	27,425
Total Cost	29,457
Accumulated Depreciation	6,170
Total Cost, Net of Accumulated Depreciation	23,287
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2014
Stow, OH [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 993
Buildings & Improvements, Initial Cost	9,028
Improvements, Initial Cost	0
Land, Total Cost	993
Buildings & Improvements, Total Cost	40,073
Total Cost	41,066
Accumulated Depreciation	24,658
Total Cost, Net of Accumulated Depreciation	16,408
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	1969
Westlake, OH [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 424
Buildings & Improvements, Initial Cost	4,004
Improvements, Initial Cost	0
Land, Total Cost	424
Buildings & Improvements, Total Cost	31,481
Total Cost	31,905
Accumulated Depreciation	5,779
Total Cost, Net of Accumulated Depreciation	26,126
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	1974
Portland, OR [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 20,208
Buildings & Improvements, Initial Cost	50,738
Improvements, Initial Cost	0
Land, Total Cost	20,208
Buildings & Improvements, Total Cost	65,141
Total Cost	85,349
Accumulated Depreciation	17,900
Total Cost, Net of Accumulated Depreciation	67,449
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2012
Portland, OR [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 10,122
Buildings & Improvements, Initial Cost	37,457
Improvements, Initial Cost	0
Land, Total Cost	10,122
Buildings & Improvements, Total Cost	37,744
Total Cost	47,866
Accumulated Depreciation	1,609
Total Cost, Net of Accumulated Depreciation	46,257
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2019
Boothwyn, PA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 6,370
Buildings & Improvements, Initial Cost	16,931
Improvements, Initial Cost	0
Land, Total Cost	6,370
Buildings & Improvements, Total Cost	16,931
Total Cost	23,301
Accumulated Depreciation	188
Total Cost, Net of Accumulated Depreciation	23,113
Encumbrances	$ 16,350
Date of Construction (C) Acquisition (A)	2020
Downingtown, PA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 4,175
Buildings & Improvements, Initial Cost	15,678
Improvements, Initial Cost	0
Land, Total Cost	4,175
Buildings & Improvements, Total Cost	15,678
Total Cost	19,853
Accumulated Depreciation	187
Total Cost, Net of Accumulated Depreciation	19,666
Encumbrances	$ 32,398
Date of Construction (C) Acquisition (A)	2020
Easton, PA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 7,691
Buildings & Improvements, Initial Cost	20,405
Improvements, Initial Cost	0
Land, Total Cost	7,691
Buildings & Improvements, Total Cost	20,405
Total Cost	28,096
Accumulated Depreciation	238
Total Cost, Net of Accumulated Depreciation	27,858
Encumbrances	$ 30,700
Date of Construction (C) Acquisition (A)	2020
Anderson, SC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 1,372
Buildings & Improvements, Initial Cost	11,656
Improvements, Initial Cost	0
Land, Total Cost	1,372
Buildings & Improvements, Total Cost	11,656
Total Cost	13,028
Accumulated Depreciation	35
Total Cost, Net of Accumulated Depreciation	12,993
Encumbrances	$ 15,736
Date of Construction (C) Acquisition (A)	2020
Mount Pleasant, SC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 2,430
Buildings & Improvements, Initial Cost	10,470
Improvements, Initial Cost	0
Land, Total Cost	2,341
Buildings & Improvements, Total Cost	30,861
Total Cost	33,202
Accumulated Depreciation	16,242
Total Cost, Net of Accumulated Depreciation	16,960
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	1995
Brentwood, TN [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 6,101
Buildings & Improvements, Initial Cost	25,956
Improvements, Initial Cost	0
Land, Total Cost	6,101
Buildings & Improvements, Total Cost	27,994
Total Cost	34,095
Accumulated Depreciation	7,189
Total Cost, Net of Accumulated Depreciation	26,906
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Highland Village, TX [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 5,545
Buildings & Improvements, Initial Cost	28,365
Improvements, Initial Cost	0
Land, Total Cost	5,545
Buildings & Improvements, Total Cost	30,679
Total Cost	36,224
Accumulated Depreciation	8,847
Total Cost, Net of Accumulated Depreciation	27,377
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Round Rock, TX [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 3,467
Buildings & Improvements, Initial Cost	8,839
Improvements, Initial Cost	0
Land, Total Cost	3,467
Buildings & Improvements, Total Cost	8,754
Total Cost	12,221
Accumulated Depreciation	398
Total Cost, Net of Accumulated Depreciation	11,823
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2019
San Antonio, TX [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 3,475
Buildings & Improvements, Initial Cost	37,327
Improvements, Initial Cost	0
Land, Total Cost	4,873
Buildings & Improvements, Total Cost	53,570
Total Cost	58,443
Accumulated Depreciation	28,774
Total Cost, Net of Accumulated Depreciation	29,669
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2002
San Antonio, TX [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 5,602
Buildings & Improvements, Initial Cost	39,196
Improvements, Initial Cost	0
Land, Total Cost	10,158
Buildings & Improvements, Total Cost	113,730
Total Cost	123,888
Accumulated Depreciation	46,080
Total Cost, Net of Accumulated Depreciation	77,808
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2007
San Antonio, TX [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 2,381
Buildings & Improvements, Initial Cost	6,487
Improvements, Initial Cost	0
Land, Total Cost	2,381
Buildings & Improvements, Total Cost	24,530
Total Cost	26,911
Accumulated Depreciation	11,562
Total Cost, Net of Accumulated Depreciation	15,349
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2007
Fairfax, VA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 15,681
Buildings & Improvements, Initial Cost	68,536
Improvements, Initial Cost	0
Land, Total Cost	15,681
Buildings & Improvements, Total Cost	71,083
Total Cost	86,764
Accumulated Depreciation	16,921
Total Cost, Net of Accumulated Depreciation	69,843
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2013
Richmond, VA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 7,331
Buildings & Improvements, Initial Cost	49,278
Improvements, Initial Cost	0
Land, Total Cost	7,331
Buildings & Improvements, Total Cost	49,278
Total Cost	56,609
Accumulated Depreciation	136
Total Cost, Net of Accumulated Depreciation	56,473
Encumbrances	$ 34,250
Date of Construction (C) Acquisition (A)	2020
Richmond, VA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 11,879
Buildings & Improvements, Initial Cost	34,736
Improvements, Initial Cost	0
Land, Total Cost	11,879
Buildings & Improvements, Total Cost	36,823
Total Cost	48,702
Accumulated Depreciation	16,196
Total Cost, Net of Accumulated Depreciation	32,506
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2007
Springfield, VA [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 17,016
Buildings & Improvements, Initial Cost	40,038
Improvements, Initial Cost	0
Land, Total Cost	17,016
Buildings & Improvements, Total Cost	44,753
Total Cost	61,769
Accumulated Depreciation	19,119
Total Cost, Net of Accumulated Depreciation	42,650
Encumbrances	$ 0
Date of Construction (C) Acquisition (A)	2007
Portfolio Balance (SITE) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Land, Initial Cost	$ 25,475
Buildings & Improvements, Initial Cost	195,350
Improvements, Initial Cost	0
Land, Total Cost	25,475
Buildings & Improvements, Total Cost	195,350
Total Cost	220,825
Accumulated Depreciation	110,592
Total Cost, Net of Accumulated Depreciation	110,233
Encumbrances	$ 0