Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Investments:
Fixed maturities available-for-sale, cost	$ 714,137	$ 667,966
Fixed maturities held-to-maturity, fair value	264,966	232,891
Available-for-sale equity securities, amortized cost basis	23,727	68,787
Real estate held for investment, accumulated depreciation	1,721	1,575
Due premiums, allowance for doubtful accounts	$ 1,490	$ 1,364
Common Stock Class A [Member]
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	52,215,852	52,215,852
Common stock, shares outstanding (in shares)	52,215,852	52,215,852
Common stock, shares in treasury (in shares)	3,135,738	3,135,738
Common Stock Class B [Member]
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0.00	$ 0.00
Common stock, shares authorized (in shares)	2,000,000	2,000,000
Common stock, shares issued (in shares)	1,001,714	1,001,714
Common stock, shares outstanding (in shares)	1,001,714	1,001,714