Unaudited Interim Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Amortized Cost	$ 6,460,366	$ 5,866,873
Amortized Cost	$ 59,600	$ 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