Condensed Consolidated Statement of Noncontrolling Interests and Equity - USD ($) $ in Thousands	Total	Series D Units	Redemption of Operating Partnership units for cash	Redemption of Operating Partnership units for cash Series B Units	Redemption Of Units For Common Stock	Redemption Of Units For Common Stock Series A Units	Redemption Of Units For Common Stock Series D Units	Noncontrolling Interest - Preferred Operating Partnership	Noncontrolling Interest - Preferred Operating Partnership Series D Units	Noncontrolling Interest - Preferred Operating Partnership Redemption of Operating Partnership units for cash Series B Units	Noncontrolling Interest - Preferred Operating Partnership Redemption Of Units For Common Stock Series A Units	Noncontrolling Interest - Preferred Operating Partnership Redemption Of Units For Common Stock Series D Units	Noncontrolling Interest - Operating Partnership	Noncontrolling Interest - Operating Partnership Redemption of Operating Partnership units for cash	Noncontrolling Interest - Operating Partnership Redemption Of Units For Common Stock	Noncontrolling Interest - Other	Common stock	Common stock Redemption Of Units For Common Stock	Common stock Redemption Of Units For Common Stock Series A Units	Common stock Redemption Of Units For Common Stock Series D Units	Additional Paid-in Capital	Additional Paid-in Capital Redemption of Operating Partnership units for cash	Additional Paid-in Capital Redemption Of Units For Common Stock	Additional Paid-in Capital Redemption Of Units For Common Stock Series A Units	Additional Paid-in Capital Redemption Of Units For Common Stock Series D Units	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Balance, beginning of period at Dec. 31, 2021	$ 3,785,976							$ 259,110					$ 410,053			$ 317	$ 1,339				$ 3,285,948					$ (42,546)	$ (128,245)
Balance, beginning of period (in shares) at Dec. 31, 2021																	133,922,305
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock in connection with share based compensation (in shares)																	200,454
Issuance of common stock in connection with share based compensation	15,433																$ 2				15,431
Restricted stock grants cancelled (in shares)																	(9,702)
Redemption of Operating Partnership units			$ (3,504)	$ (4,500)						$ (4,500)				$ (1,125)								$ (2,379)
Noncontrolling interest in consolidated joint ventures	338															338
Operating Partnership units in conjunction with business combinations (in shares)	16,000	$ 6,000							$ 6,000				16,000
Issuance of Operating Partnership units in conjunction with acquisitions	125,000												125,000
Issuance of common stock in conjunction with acquisitions (in shares)																	186,766
Issuance of common stock in conjunction with acquisitions	40,963																$ 2				40,961
Repurchase of common stock, net of offering costs (in shares)																	381,786
Repurchase of common stock, net of offering costs	(63,008)																$ (4)										(63,004)
Net income	701,677							13,278					31,971														656,428
Other comprehensive income (loss)	95,984							578					4,339													91,067
Distributions to Operating Partnership units held by noncontrolling interests	(42,632)							(12,972)					(29,660)
Dividends paid on common stock	(604,429)																										(604,429)
Balance, end of period at Sep. 30, 2022	4,069,298							261,494					556,578			655	$ 1,339				3,339,961					48,521	(139,250)
Balance, end of period (in shares) at Sep. 30, 2022																	133,918,037
Balance, beginning of period at Dec. 31, 2021	$ 3,785,976							259,110					410,053			317	$ 1,339				3,285,948					(42,546)	(128,245)
Balance, beginning of period (in shares) at Dec. 31, 2021																	133,922,305
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock, net of offering costs (in shares)	(381,786)
Repurchase of common stock, net of offering costs	$ (63,008)
Balance, end of period at Dec. 31, 2022	$ 4,078,274							261,502					556,095			1,080	$ 1,339				3,345,332					48,798	(135,872)
Balance, end of period (in shares) at Dec. 31, 2022	133,921,020																133,921,020
Balance, beginning of period at Jun. 30, 2022	$ 3,893,240							261,231					429,572			317	$ 1,339				3,334,317					25,555	(159,091)
Balance, beginning of period (in shares) at Jun. 30, 2022																	133,900,184
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock in connection with share based compensation (in shares)																	19,654
Issuance of common stock in connection with share based compensation	5,644																				5,644
Restricted stock grants cancelled (in shares)																	(1,801)
Noncontrolling interest in consolidated joint ventures	338															338
Issuance of Operating Partnership units in conjunction with acquisitions	125,000												125,000
Net income	236,126							4,454					10,953														220,719
Other comprehensive income (loss)	24,222							145					1,111													22,966
Distributions to Operating Partnership units held by noncontrolling interests	(14,394)							(4,336)					(10,058)
Dividends paid on common stock	(200,878)																										(200,878)
Balance, end of period at Sep. 30, 2022	4,069,298							261,494					556,578			655	$ 1,339				3,339,961					48,521	(139,250)
Balance, end of period (in shares) at Sep. 30, 2022																	133,918,037
Balance, beginning of period at Dec. 31, 2022	$ 4,078,274							261,502					556,095			1,080	$ 1,339				3,345,332					48,798	(135,872)
Balance, beginning of period (in shares) at Dec. 31, 2022	133,921,020																133,921,020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock in connection with share based compensation (in shares)																	144,640
Issuance of common stock in connection with share based compensation	$ 19,433																$ 2				19,431
Taxes paid upon settlement of share based compensation (in shares)																	(8,074)
Taxes paid upon net settlement of share based compensation	(7,606)																				(7,606)
Restricted stock grants cancelled (in shares)																	(6,983)
Redemption of Operating Partnership units					$ 0	$ (5,316)	$ 0				$ (16,339)	$ (22,064)			$ (163)				$ 8	$ 2			$ 163	$ 11,015	$ 22,062
Redemption of Operating Partnership units (in shares)																		2,119	851,698	154,307
Life Storage Merger issuance of common stock and Operating Partnership units	11,602,808												249,470				$ 762				11,352,576
Life Storage Merger issuance of common stock and Operating Partnership units (in shares)																	76,217,359
Noncontrolling interest in consolidated joint ventures	$ 7,309															7,309
Repurchase of common stock, net of offering costs (in shares)	0
Net income	$ 623,046							6,761					29,353			(132)											587,064
Other comprehensive income (loss)	(4,175)												(289)													(3,886)
Distributions to Operating Partnership units held by noncontrolling interests	(43,003)							(6,921)					(36,082)
Dividends paid on common stock	(704,069)																										(704,069)
Balance, end of period at Sep. 30, 2023	$ 15,566,701							222,939					798,384			8,257	$ 2,113				14,742,973					44,912	(252,877)
Balance, end of period (in shares) at Sep. 30, 2023	211,276,086																211,276,086
Balance, beginning of period at Jun. 30, 2023	$ 4,035,407							222,940					553,610			3,079	$ 1,351				3,383,303					47,065	(175,941)
Balance, beginning of period (in shares) at Jun. 30, 2023																	135,058,897
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock in connection with share based compensation (in shares)																	1,253
Issuance of common stock in connection with share based compensation	6,994																				6,994
Taxes paid upon settlement of share based compensation (in shares)																	(414)
Taxes paid upon net settlement of share based compensation	(63)																				(63)
Restricted stock grants cancelled (in shares)																	(3,128)
Redemption of Operating Partnership units					$ 0										$ (163)								$ 163
Redemption of Operating Partnership units (in shares)																		2,119
Life Storage Merger issuance of common stock and Operating Partnership units	11,602,808												249,470				$ 762				11,352,576
Life Storage Merger issuance of common stock and Operating Partnership units (in shares)																	76,217,359
Noncontrolling interest in consolidated joint ventures	5,209															5,209
Net income	198,856							2,253					8,284			(31)											188,350
Other comprehensive income (loss)	(2,264)												(111)													(2,153)
Distributions to Operating Partnership units held by noncontrolling interests	(14,960)							(2,254)					(12,706)
Dividends paid on common stock	(265,286)																										(265,286)
Balance, end of period at Sep. 30, 2023	$ 15,566,701							$ 222,939					$ 798,384			$ 8,257	$ 2,113				$ 14,742,973					$ 44,912	$ (252,877)
Balance, end of period (in shares) at Sep. 30, 2023	211,276,086																211,276,086