Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Investments:
Fixed maturities, available-for-sale, at fair value (amortized cost: 2016: $2,558,621; 2015: $2,400,245)	$ 2,632,313	$ 2,414,210
Equity securities, available-for-sale, at fair value (cost: 2016: $292,698; 2015: $281,943)	329,635	305,271
Short-term investments, at fair value (amortized cost: 2016: $144,845; 2015: $217,743)	144,843	217,745
Total investments	3,106,791	2,937,226
Cash	121,868	69,901
Premiums receivable	363,343	276,616
Prepaid reinsurance premiums	222,414	232,588
Reinsurance recoverable on paid losses	59,950	49,506
Reinsurance recoverable on unpaid losses and loss adjustment expenses	814,261	809,518
Deferred policy acquisition costs	113,394	91,983
Accrued investment income	16,176	16,001
Goodwill and other intangible assets	6,579	6,807
Current income tax receivable, net	18,522	22,323
Deferred income tax, net		3,900
Other assets	53,323	67,643
Total assets	4,896,621	4,584,012
Liabilities:
Reserves for losses and loss adjustment expenses	2,268,763	2,202,644
Unearned premiums	904,507	820,676
Reinsurance balances payable	127,742	107,411
Senior notes	263,653	263,580
Deferred income tax, net	14,475
Payable for investments purchased	48,558	1,495
Accounts payable and other liabilities	87,365	92,058
Total liabilities	3,715,063	3,487,864
Stockholders' equity:
Preferred stock, $.10 par value, authorized 1,000,000 shares, none issued
Common stock, $.10 par value, authorized 50,000,000 shares, issued 18,055,818 shares for 2016 and 17,942,269 shares for 2015	1,805	1,793
Additional paid-in capital	363,588	357,829
Treasury stock, at cost (3,511,380 shares for 2016 and 2015)	(155,801)	(155,801)
Retained earnings	906,536	868,723
Accumulated other comprehensive income	65,430	23,604
Total stockholders' equity	1,181,558	1,096,148
Total liabilities and stockholders' equity	$ 4,896,621	$ 4,584,012