Earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Reconciliation of basic and diluted EPS
Net (loss) income	$ (1,216,726)	$ 510,733	$ 280,994
Net income attributable to noncontrolling interests	(212,844)	(187,784)	(177,355)
Net income attributable to unvested RSAs with nonforfeitable dividends	(8,417)	(13,394)	(11,195)
Numerator for basic and diluted EPS – net (loss) income attributable to Alexandria Real Estate Equities, Inc.’s common stockholders	$ (1,437,987)	$ 309,555	$ 92,444
Denominator for basic EPS – weighted-average shares of common stock outstanding	170,307	172,071	170,909
Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends	0	0	0
Denominator for diluted EPS – weighted-average shares of common stock outstanding	170,307	172,071	170,909
Earnings per share attributable to Alexandria's common stockholders – basic and diluted:
Earnings per share - basic (USD per share)	$ (8.44)	$ 1.80	$ 0.54
Earnings per share - diluted (USD per share)	$ (8.44)	$ 1.80	$ 0.54