Statements of Financial Position (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fixed maturities, available-for-sale, amortized cost	$ 3,621,722	$ 3,827,496
Available-for-sale equity securities amortized cost basis	$ 18	$ 18
Common stock, par value	$ 100	$ 100
Common stock, shares authorized	25,000	25,000
Common stock, shares issued	25,000	25,000
Common stock, shares outstanding	25,000	25,000