CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Investments:
Fixed maturity securities available-for-sale, amortized cost	$ 1,233,772	$ 1,189,525
Equity securities available-for-sale, cost	150,428	147,479
Deferred policy acquisition costs from affiliates	43,836	40,660
Affiliated other assets	4,818	4,632
LIABILITIES
Affiliated losses and settlement expenses	720,901	685,533
Unearned premiums from affiliates	281,055	243,682
Affiliated other liabilities	$ 24,155	$ 27,871
STOCKHOLDERS' EQUITY
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock, shares issued (in shares)	21,379,763	21,222,535
Common stock, shares outstanding (in shares)	21,379,763	21,222,535