Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Fixed maturities, Held-to-maturity, at fair value	$ 675	$ 404
Fixed maturities, Available-for-sale securities, at amortized cost	2,793,069	2,773,566
Fixed maturities, Trading securities, at amortized cost	11,475	14,363
Equity securities, Available-for-sale securities, at amortized cost	68,514	71,651
Equity securities, Trading securities, at amortized cost	4,443	3,708
Allowance for doubtful accounts	867	618
Property and equipment, accumulated depreciation	$ 46,590	$ 41,492
Common stock, par value per share (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	25,151,428	25,019,415
Common stock, shares outstanding	25,151,428	25,019,415