Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Successor [Member]
Fixed income securities, amortized cost	$ 4,992,756	$ 4,514,878
Fixed income securities pledged as collateral, amortized cost	64,612	64,378
Short-term investments, amortized cost	225,789	360,069
Other Investments at Fair Value	$ 285,261	$ 240,969
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	130,000,000	130,000,000
Common stock, shares issued	45,044,222	45,005,932
Common stock, shares outstanding	45,044,222	45,005,932
Treasury stock, shares	8,202	2,459