Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Balance Sheet Related Disclosures [Abstract]
Fixed maturities, held-to-maturity securities, fair value	$ 667	$ 675
Fixed maturities, available-for-sale securities, amortized cost	2,770,718	2,793,069
Fixed maturities, trading securities, amortized cost	11,537	11,475
Equity securities, available-for-sale securities, amortized cost	68,724	68,514
Equity securities, trading securities, amortized cost	4,443	4,443
Allowance for doubtful accounts	1,039	867
Property and equipment accumulated depreciation	$ 47,393	$ 46,590
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	25,324,068	25,151,428
Common stock, shares outstanding	25,324,068	25,151,428