CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (18,158)	$ (14,697)	$ (170,700)	$ (50,826)
Other comprehensive income (loss)
Foreign currency translation adjustments related to investment in unconsolidated venture	459	786	(399)	(88)
Total other comprehensive income (loss)	459	786	(399)	(88)
Comprehensive income (loss)	(17,699)	(13,911)	(171,099)	(50,914)
Comprehensive (income) loss attributable to non-controlling interests	171	73	951	439
Comprehensive income (loss) attributable to NorthStar Healthcare Income, Inc. common stockholders	$ (17,528)	$ (13,838)	$ (170,148)	$ (50,475)