Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Fixed maturities, available-for-sale, amortized cost	$ 6,775,806	$ 5,866,873
Equity securities, available-for-sale, amortized cost	$ 54,609	$ 28,881
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 10	$ 10
Common Stock, Shares Authorized	1,000,000	1,000,000
Common Stock, Shares, Issued	250,000	250,000
Common Stock, Shares, Outstanding	250,000	250,000