Investments (Investment Gains and Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Available for sale debt securities:
Realized gains on disposal	$ 761	$ 1,183
Realized losses on disposal	0	(84)
Held to maturity debt securities:
Realized gains on disposal	2,724	27
Realized losses on disposal	0	0
Real estate gains (losses)	0	3,503
Totals	$ 3,485	$ 4,629