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Schedule III - Real Estate and Accumulated Depreciation
12 Months Ended
Dec. 31, 2023
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, 2023
Self - Storage Facilities by State:Store Count Land Initial Cost Building and ImprovementsAccumulated Depreciation
 Debt Land Total
AL37$5,686 $52,358 $380,499 $5,593 $52,356 $386,094 $438,450 $18,152 
AZ4622,349 135,775 523,811 14,566 135,774 538,378 674,152 44,843 
CA218328,992 921,260 2,322,145 250,704 919,806 2,574,302 3,494,108 436,926 
CO2726,374 49,985 192,497 20,004 50,703 211,783 262,486 33,009 
CT236,399 43,453 373,628 6,530 43,452 380,158 423,610 18,276 
FL245167,386 672,426 2,894,604 122,780 674,576 3,015,234 3,689,810 239,687 
GA11978,837 303,954 1,179,911 47,713 303,941 1,227,636 1,531,577 123,363 
HI14— 29,836 160,978 22,962 29,836 183,939 213,775 43,351 
ID2— 4,047 25,235 59 4,047 25,294 29,341 812 
IL10516,231 210,472 1,107,463 43,952 209,924 1,151,964 1,361,888 82,109 
IN91— 64,531 494,467 14,626 64,875 524,169 589,044 34,445 
KS1— 366 1,897 1,150 366 3,047 3,413 1,555 
KY1530,470 10,026 88,389 21,129 10,799 108,745 119,544 21,462 
LA10— 16,673 126,604 5,591 16,674 132,194 148,868 8,844 
MA6439,808 120,291 534,152 65,286 120,472 599,257 719,729 123,019 
MD4474,081 157,195 450,952 36,025 156,605 487,567 644,172 111,043 
ME5— 2,352 86,339 195 2,352 86,534 88,886 926 
MI84,301 10,900 63,388 6,630 10,900 70,018 80,918 13,061 
MN8— 14,925 104,513 6,940 14,925 111,453 126,378 10,240 
MO28— 31,800 347,070 8,250 31,758 355,362 387,120 13,743 
MS7— 9,053 82,098 1,977 9,052 84,076 93,128 5,559 
NC52— 93,492 557,728 14,431 93,489 572,161 665,650 32,134 
NH17— 50,952 195,719 1,735 51,015 197,391 248,406 5,097 
NJ8899,207 308,001 1,071,004 70,630 313,354 1,136,281 1,449,635 209,349 
NM1125,153 31,826 68,779 6,909 31,826 75,689 107,515 17,000 
NV3330,458 97,497 469,028 9,504 97,497 478,532 576,029 23,846 
NY7912,895 340,256 1,195,359 66,207 340,991 1,260,831 1,601,822 105,190 
OH5010,140 71,460 388,236 13,917 71,459 402,154 473,613 24,721 
OK4— 3,917 28,534 159 3,917 28,693 32,610 429 
OR823,904 15,066 68,044 2,938 15,066 70,982 86,048 14,126 
PA3110,635 57,671 356,325 29,609 56,997 386,607 443,604 46,425 
RI63,712 6,132 55,033 1,793 6,131 56,827 62,958 4,517 
SC4027,701 65,032 385,333 13,408 65,036 398,737 463,773 41,190 
TN2944,491 50,603 252,731 15,296 50,603 268,027 318,630 36,356 
TX241104,794 534,804 2,603,707 97,822 534,655 2,701,678 3,236,333 212,009 
UT1016,265 9,008 39,295 9,775 9,008 49,070 58,078 15,445 
VA7356,422 198,998 842,848 37,952 198,998 880,800 1,079,798 127,878 
WA144,874 51,011 147,943 13,780 51,013 161,720 212,733 19,542 
WI1— 1,076 16,054 70 1,076 16,123 17,199 173 
DC17,540 14,394 18,172 634 14,394 18,806 33,200 3,904 
Other corporate assets— — — 245,910 — 245,910 245,910 92,553 
Intangible tenant relationships and lease rights— — 348,762 — — 348,762 348,762 204,135 
Construction in Progress/Undeveloped Land— 22,985 2,779 124,265 34,987 118,745 153,732 — 
Right of use asset - finance lease— — — 143,841 — 143,843 143,843 3,960 
Totals (1)
1,905$1,279,105 $4,885,859 $20,652,053 $1,623,247 $4,904,705 $22,275,573 $27,180,278 $2,624,404 

(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, 2023, 2022 and 2021 is as follows:
202320222021
Operating facilities
Balance at beginning of year$12,084,025 $10,643,722 $9,507,788 
Acquisitions14,715,285 1,390,463 1,500,703 
Improvements175,932 95,282 80,131 
Transfers from construction in progress87,485 70,565 62,462 
Dispositions and other(1,194)(116,007)(507,362)
Balance at end of year$27,061,533 $12,084,025 $10,643,722 
Accumulated depreciation:
Balance at beginning of year$2,138,395 $1,868,321 $1,681,429 
Depreciation expense486,010 276,155 230,445 
Dispositions and other— (6,081)(43,553)
Balance at end of year$2,624,405 $2,138,395 $1,868,321 
Real estate under development/redevelopment:
Balance at beginning of year$52,348 $59,248 $67,443 
Current development153,920 63,597 54,267 
Transfers to operating facilities(87,523)(70,565)(62,462)
Dispositions and other— 68 — 
Balance at end of year$118,745 $52,348 $59,248 
Net non-lease real estate assets$24,555,873 $9,997,978 $8,834,649 
(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, 2023, the aggregate cost of real estate for U.S. federal income tax purposes was $17,961,173.