Investments (Non-Cash OTTI Credit Losses Recognized in Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Investments [Abstract]
Balance of credit-related OTTI, Beginning	$ 2,396	$ 2,597	$ 2,446	$ 2,646
Reduction for increases in cash flows expected to be collected	(51)	(50)	(101)	(99)
Balance of credit-related OTTI, Ending	$ 2,345	$ 2,547	$ 2,345	$ 2,547