BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fixed maturity available-for-sale securities, amortized cost	$ 1,219,443	$ 1,418,128
Equity available-for-sale securities, cost	0	25,473
Equity securities, cost	$ 25,473	$ 0
Common stock, par value	$ 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
Fixed maturity AFS securities
Fixed maturity available-for-sale securities, amortized cost	$ 1,219,443	$ 1,418,128