Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income	$ 682,948	$ 739,134
Adjustments to reconcile net income to net cash flows from operating activities:
Gain on real estate investment sales	(1,117)	(341)
Depreciation and amortization	273,518	248,800
Equity in earnings of unconsolidated real estate entities	(41,623)	(36,586)
Distributions from cumulative equity in earnings of unconsolidated real estate entities	37,032	38,562
Foreign currency exchange loss (gain)	10,350	(2,573)
Share-based compensation expense	12,801	12,374
Other	28,165	15,815
Total adjustments	319,126	276,051
Net cash flows from operating activities	1,002,074	1,015,185
Cash flows from investing activities:
Capital expenditures to maintain real estate facilities	(99,883)	(71,012)
Development and expansion of real estate facilities	(88,682)	(146,375)
Acquisition of real estate facilities and intangible assets	(253,331)	(196,185)
Distributions in excess of cumulative equity in earnings from unconsolidated real estate entities	10,803
Repayment of note receivable	4,860
Proceeds from sale of real estate investments	1,399	438
Net cash flows used in investing activities	(424,834)	(413,134)
Cash flows from financing activities:
Repayments on notes payable	(1,000)	(948)
Issuance of notes payable, net of issuance costs	545,151	496,900
Issuance of preferred shares	549,170	276,723
Issuance of common shares	3,686	17,390
Redemption of preferred shares		(572,500)
Cash paid upon vesting of restricted share units	(9,085)	(10,011)
Acquisition of noncontrolling interests	(33)
Contributions by noncontrolling interests	1,433	1,302
Distributions paid to preferred shareholders, common shareholders and restricted share unitholders	(804,593)	(807,608)
Distributions paid to noncontrolling interests	(2,550)	(3,533)
Net cash flows from (used in) financing activities	282,179	(602,285)
Net cash flows from (used in) operating, investing, and financing activities	859,419	(234)
Net effect of foreign exchange translation	(28)	46
Increase (decrease) in cash and equivalents, including restricted cash	859,391	(188)
Cash and equivalents, including restricted cash at beginning of the period:
Cash and equivalents	409,743	361,218
Restricted cash included in other assets	23,811	22,801
Cash, equivalents, and restricted cash	433,554	384,019
Cash and equivalents, including restricted cash at end of the period:
Cash and equivalents	1,268,475	360,331
Restricted cash included in other assets	24,470	23,500
Cash, equivalents, and restricted cash	1,292,945	383,831
Costs incurred during the period remaining unpaid at period end for:
Capital expenditures to maintain real estate facilities	(12,363)	(12,635)
Construction or expansion of real estate facilities	(26,763)	(57,675)
Accrued and other liabilities	39,126	70,310
Real estate acquired in exchange for assumption of notes payable		(1,817)
Notes payable assumed in connection with acquisition of real estate		1,817
Preferred shares called for redemption and reclassified to liabilities	495,000
Preferred shares called for redemption and reclassified from equity	(495,000)
Foreign currency translation adjustment:
Investments in unconsolidated real estate entities	8,246	3,489
Notes payable	10,322	(2,527)
Accumulated other comprehensive loss	$ (18,596)	$ (916)