Stockholders' equity (Tables)

12 Months Ended

Dec. 31, 2019

Stockholders' Equity Note [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table presents the changes in each component of accumulated other comprehensive income (loss) attributable to Alexandria Real Estate Equities, Inc.’s stockholders during the year ended December 31, 2019 (in thousands):

	Net Unrealized Gains (Losses) on:
	Interest Rate Hedge Agreements			Foreign Currency Translation			Total
Balance as of December 31, 2018	$	1,838		$	(12,273	)	$	(10,435	)
Other comprehensive (loss) income before reclassifications	(1,763		)	2,524			761
Reclassification of amortization income to interest expense	(1,777		)	—			(1,777		)
Reclassification of losses in accumulated other comprehensive income to interest expense upon swap termination	1,702			—			1,702
Net other comprehensive (loss) income	(1,838		)	2,524			686
Balance as of December 31, 2019	$	—		$	(9,749	)	$	(9,749	)