Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Period Type:	duration

Investments - Equity in Earnings (Losses) of Limited Partnerships by Method of Accounting (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2018 fund
Investments in limited partnerships
Equity in earnings (losses) of limited partnerships	$ 404	$ (219)	$ (743)	$ (411)
Equity method of accounting
Investments in limited partnerships
Equity in earnings (losses) of limited partnerships	404	(216)	(743)	(21)
Fair value option
Investments in limited partnerships
Number of real estate limited partnerships that do not meet the criteria of an investment company \| fund					1
Equity in earnings (losses) of limited partnerships	$ 0	$ (3)	$ 0	$ (390)