Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
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	21,854,597	21,736,431
Common stock, outstanding shares	21,642,514	21,524,348
Treasury stock	212,083	212,083
Schedule of Available-for-sale Securities
Other investments, cost	$ 483,088	$ 450,074
Fixed Maturities
Schedule of Available-for-sale Securities
Fixed maturities, cost	453,623	396,415
Equity Securities
Schedule of Available-for-sale Securities
Equity securities, cost	24,046	48,679
Other Long-term Investments
Schedule of Available-for-sale Securities
Other investments, cost	$ 5,419	$ 4,980