Investments (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) security item	Dec. 31, 2018 USD ($) security item
Schedule of Available-for-sale Securities [Line Items]
Investments exceeding 10% of stockholder's equity | item	0	0
Gross gains on investments	$ 5,000	$ 2,500
Realized gains on sale of investments	4,100	1,500
Gross losses on investments	500	700
Realized losses on sale of investments	100
Proceeds from sale of investment securities	13,000	17,700
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]
Other-than-temporary impairment	0	0
Gain (loss) on investments	$ 4,464	$ 1,803
Number of securities sold | security	6	1
Realized gains on sale of securities	$ 4,100
Securities pledged for the benefit of various state insurance departments and reinsurers	$ 28,900	$ 29,500
Equity Securities [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]
Number of debt securities with unrealized loss | security	9	20
Number of debt securities with unrealized loss, less than 12 months | security	7	17
Number of debt securities with unrealized loss, greater than 12 months | security	2	3
Debt Securities [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]
Number of debt securities with unrealized loss | security	61	328
Number of debt securities with unrealized loss, less than 12 months | security	41	221
Number of debt securities with unrealized loss, greater than 12 months | security	20	107
Realized losses on sale of security		$ 100