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Schedule III - Real Estate and Accumulated Depreciation
 12 Months Ended
Dec. 31, 2022
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]  
Schedule III - Real Estate and Accumulated Depreciation
 Building and Improvements Initial Cost Adjustments and Costs to Land and Building Subsequent to Acquisition Gross carrying amount at December 31, 2022
Self - Storage Facilities by State:Store Count Land Initial Cost Building and ImprovementsAccumulated Depreciation
 Debt Land Total
AL9$5,687 $12,759 $78,243 $4,164 $12,759 $82,407 $95,166 $12,590 
AZ2523,676 37,192 150,772 12,588 37,190 163,362 200,552 36,053 
CA177334,247 665,423 1,394,380 199,150 663,569 1,595,384 2,258,953 379,484 
CO1728,137 17,224 81,144 18,733 17,942 99,159 117,101 28,713 
CT76,609 9,789 61,688 5,631 9,789 67,319 77,108 12,866 
FL112170,965 203,643 869,142 102,902 205,335 970,352 1,175,687 189,822 
GA6774,374 89,898 455,894 42,551 89,882 498,461 588,343 100,924 
HI14— 28,537 160,978 14,085 28,537 175,063 203,600 38,133 
ID2— 4,047 25,235 20 4,047 25,255 29,302 162 
IL6016,627 61,580 344,755 38,447 61,033 383,749 444,782 62,487 
IN91— 64,531 494,469 8,141 64,528 502,613 567,141 20,388 
KS1— 366 1,897 1,123 366 3,020 3,386 1,442 
KY1331,483 8,531 77,872 19,485 9,303 96,585 105,888 18,590 
LA5— 10,005 51,934 5,144 10,006 57,077 67,083 6,501 
MA4733,948 77,617 276,254 60,272 77,798 336,345 414,143 110,133 
MD3577,135 109,414 345,585 33,514 108,822 379,690 488,512 99,014 
MI85,486 10,900 63,388 5,498 10,900 68,886 79,786 11,008 
MN7— 9,696 74,960 6,537 9,696 81,497 91,193 7,755 
MO6— 5,633 34,252 7,499 5,591 41,793 47,384 8,587 
MS3— 2,914 29,630 1,410 2,914 31,040 33,954 4,105 
NC23— 38,463 150,475 12,017 38,461 162,494 200,955 22,883 
NH2— 754 4,054 1,401 817 5,392 6,209 2,881 
NJ64109,010 142,724 651,442 57,849 145,950 706,065 852,015 184,072 
NM1118,648 31,826 68,779 5,978 31,826 74,758 106,584 14,760 
NV1430,597 15,252 74,376 7,085 15,252 81,461 96,713 17,259 
NY2813,807 121,945 237,795 46,207 122,680 283,267 405,947 85,218 
OH2411,374 19,973 77,180 10,995 19,973 88,175 108,148 18,509 
OK1— 721 6,125 — 721 6,125 6,846 65 
OR816,431 15,066 68,044 2,617 15,066 70,661 85,727 12,199 
PA2110,894 39,704 203,360 17,340 39,032 221,371 260,403 38,174 
RI23,835 3,191 6,926 1,550 3,191 8,476 11,667 3,729 
SC2327,850 36,617 148,900 12,120 36,618 161,019 197,637 33,901 
TN2244,489 35,981 151,674 13,587 35,981 165,262 201,243 30,348 
TX111111,417 205,385 760,041 75,963 205,237 836,152 1,041,389 166,839 
UT1016,670 9,008 39,295 3,615 9,008 42,910 51,918 13,949 
VA5358,133 156,074 517,534 32,574 156,075 550,107 706,182 108,891 
WA95,030 13,762 60,926 12,572 13,764 73,496 87,260 16,483 
DC17,864 14,394 18,172 566 14,394 18,738 33,132 3,383 
Other corporate assets— — — 207,609 — 207,609 207,609 67,700 
Intangible tenant relationships and lease rights— — 165,718 — — 165,718 165,718 144,144 
Construction in Progress/Undeveloped Land— 23,263 2,778 51,836 22,693 55,184 77,877 632 
Right of use asset - finance lease— — — 136,259 — 136,259 136,259 3,748 
Totals (1)
1,133$1,294,423 $2,353,802 $8,486,066 $1,296,634 $2,356,746 $9,779,756 $12,136,502 $2,138,524 

(1) No right-of-use assets related to operating leases are included in the ending net real estate assets information above.
Activity in real estate facilities during the years ended December 31, 2022, 2021 and 2020 is as follows:
202220212020
Operating facilities
Balance at beginning of year$10,643,722 $9,507,788 $9,129,558 
Acquisitions1,390,463 1,500,703 255,235 
Improvements95,282 80,131 66,693 
Transfers from construction in progress70,565 62,462 40,988 
Dispositions and other(116,007)(507,362)15,314 
Balance at end of year$12,084,025 $10,643,722 $9,507,788 
Accumulated depreciation:
Balance at beginning of year$1,868,321 $1,681,429 $1,473,851 
Depreciation expense276,155 230,445 217,364 
Dispositions and other(6,081)(43,553)(9,786)
Balance at end of year$2,138,395 $1,868,321 $1,681,429 
Real estate under development/redevelopment:
Balance at beginning of year$59,248 $67,443 $41,157 
Current development63,597 54,267 67,274 
Transfers to operating facilities(70,565)(62,462)(40,988)
Dispositions and other68 — — 
Balance at end of year$52,348 $59,248 $67,443 
Net non-lease real estate assets$9,997,978 $8,834,649 $7,893,802 
(1) No right-of-use assets related to operating leases are included in the ending net real estate assets information above.
As of December 31, 2022, the aggregate cost of real estate for U.S. federal income tax purposes was $9,886,378.