Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, authorized shares	1,000,000	1,000,000
Preferred stock, issued shares	0	0
Preferred stock, outstanding shares	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, authorized shares	50,000,000	50,000,000
Common stock, issued shares	42,953,087	21,858,697
Common stock, outstanding shares	42,741,004	21,646,614
Treasury stock	212,083	212,083
Schedule of Available-for-sale Securities
Other investments, cost	$ 776,054	$ 527,183
Fixed Maturities
Schedule of Available-for-sale Securities
Fixed maturities, cost	715,374	497,616
Equity Securities
Schedule of Available-for-sale Securities
Equity securities, cost	52,845	24,074
Other Long-term Investments
Schedule of Available-for-sale Securities
Other investments, cost	$ 7,835	$ 5,493