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

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Investments - Equity in Earnings (Losses) of Limited Partnerships by Method of Accounting (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2018 fund
Investments in limited partnerships
Equity in earnings (losses) of limited partnerships	$ 3,289	$ 772	$ 2,546	$ 361
Equity method of accounting
Investments in limited partnerships
Equity in earnings (losses) of limited partnerships	3,289	645	2,546	624
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	$ 127	$ 0	$ (263)