Segment Reporting - Summary of Assets by Segment (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Assets	[1]	$ 2,186,206	$ 2,264,416
Operating Segments
Segment Reporting Information [Line Items]
Assets		2,186,206	2,264,416
Operating Segments | Direct Investments - Net Lease Segment
Segment Reporting Information [Line Items]
Assets		376,284	394,697
Operating Segments | Direct Investments - Operating Segment
Segment Reporting Information [Line Items]
Assets		1,444,518	1,481,522
Operating Segments | Unconsolidated Investments
Segment Reporting Information [Line Items]
Assets		288,905	264,317
Operating Segments | Debt and Securities
Segment Reporting Information [Line Items]
Assets		57,306	59,620
Operating Segments | Corporate
Segment Reporting Information [Line Items]
Assets		$ 19,193	$ 64,260

[1] Represents the consolidated assets and liabilities of NorthStar Healthcare Income Operating Partnership, LP (the “Operating Partnership”). The Operating Partnership is a consolidated variable interest entity (“VIE”), of which the Company is the sole general partner and owns approximately 99.99%. As of June 30, 2019, the Operating Partnership includes $0.6 billion and $0.5 billion of assets and liabilities, respectively, of certain VIEs that are consolidated by the Operating Partnership. Refer to Note 2, “Summary of Significant Accounting Policies.”