Investments (Trading Account Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Major Types of Investment Securities [Line Items]
Amortized Cost	$ 65,326	$ 46,937
Fair Value	64,612	49,661
Fixed maturities, available-for-sale
Major Types of Investment Securities [Line Items]
Amortized Cost	50,565	43,490
Fair Value	46,364	44,121
Equity securities, available-for-sale
Major Types of Investment Securities [Line Items]
Amortized Cost	14,761	3,447
Fair Value	$ 18,248	$ 5,540