Segment Reporting Geographical Segments (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) property	Jun. 30, 2018 USD ($) property	Jun. 30, 2019 USD ($) property	Jun. 30, 2018 USD ($) property
Segment Reporting Information [Line Items]
Properties \| property	14	24	14	24
Rental income	$ 16,499	$ 30,162	$ 33,583	$ 62,727
Office
Segment Reporting Information [Line Items]
Rental income	15,266	28,876	30,993	60,060
Office \| Germany
Segment Reporting Information [Line Items]
Rental income	3,847	14,437	8,037	29,224
Office \| United Kingdom
Segment Reporting Information [Line Items]
Rental income	6,309	7,780	12,633	15,273
Office \| France
Segment Reporting Information [Line Items]
Rental income	5,110	5,346	10,323	10,830
Office \| Other
Segment Reporting Information [Line Items]
Rental income	0	$ 1,313	0	$ 4,733
Non-Office \| Other
Segment Reporting Information [Line Items]
Properties \| property		5		5
Rental income	$ 1,233	$ 1,286	$ 2,590	$ 2,667
Retail Site \| Germany
Segment Reporting Information [Line Items]
Properties \| property		2		2
Industrial Property \| France
Segment Reporting Information [Line Items]
Properties \| property		1		1
Hotel \| Germany
Segment Reporting Information [Line Items]
Properties \| property	2	2	2	2

NorthStar Realty Europe Corp. 10-Q