Investments Components of Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Components of net investment income
Interest on fixed maturity securities	$ 9,667	$ 9,717	$ 19,426	$ 20,844
Dividends on equity securities	1,034	1,117	2,240	2,199
Equity in earnings of other invested assets	9	478	525	760
Interest on other assets	7	8	14	17
Total investment income	10,717	11,320	22,205	23,820
Investment expenses	801	746	1,579	1,495
Net investment income	$ 9,916	$ 10,574	$ 20,626	$ 22,325

Amount of operating dividend income on securities.

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