Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Investments available for sale
Amortized cost (in dollars)	$ 1,348,767	$ 1,275,972
Property and equipment
Accumulated depreciation (in dollars)	$ 43,479	$ 42,479
Stockholders’ Equity
Common Shares, par value (in dollars per share)	$ 0.015	$ 0.015
Common Shares, authorized	233,333,000	233,333,000
Common Shares, issued	93,070,000	92,650,000
Fixed maturities
Investments available for sale
Amortized cost (in dollars)	$ 1,265,279	$ 1,189,978
Short-term investments
Investments available for sale
Amortized cost (in dollars)	$ 83,488	$ 85,994