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Investments (Details 7) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Investments (Details 7) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investments in limited partnerships
Equity in (losses) earnings of limited partnerships	$ (219)	$ 149	$ (411)	$ 362
Equity method of accounting
Investments in limited partnerships
Equity in (losses) earnings of limited partnerships	(216)	149	(21)	399
Fair value option
Investments in limited partnerships
Equity in (losses) earnings of limited partnerships	$ (3)	$ 0	$ (390)	$ (37)

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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