Investments (Mortgage Loan Allowance) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 650	$ 650
Provision	0	0	$ 0
Releases	0	0
Balance, end of period	$ 650	$ 650