CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Investments:
Fixed maturity securities available-for-sale, amortized cost	$ 1,253,166	$ 1,189,525
Equity securities available-for-sale, cost	144,274	147,479
Deferred policy acquisition costs from affiliates	40,848	40,660
Affiliated other assets	4,423	4,632
LIABILITIES
Affiliated losses and settlement expenses	726,413	685,533
Unearned premiums from affiliates	256,434	243,682
Affiliated other liabilities	$ 27,520	$ 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)	21,455,545	21,222,535
Common stock, shares outstanding (in shares)	21,455,545	21,222,535