Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
ASSETS
Fixed maturity securities (amortized cost $2,386,204; $2,270,903)	$ 2,513,418	$ 2,408,354
Equity securities (cost $484,102; $475,959)	539,258	477,088
Short-term investments (cost $152,184; $294,607)	152,081	294,653
Total investments	3,204,757	3,180,095
Cash	185,042	158,183
Receivables:
Premiums	368,303	345,387
Accrued investment income	33,778	31,109
Other	16,306	17,756
Total receivables	418,387	394,252
Deferred policy acquisition costs	190,844	185,910
Fixed assets, net	158,284	161,940
Current income taxes	0	7,058
Goodwill	42,796	42,796
Other intangible assets, net	46,090	47,589
Other assets	25,966	11,863
Total assets	4,272,166	4,189,686
LIABILITIES AND SHAREHOLDERS' EQUITY
Losses and loss adjustment expenses	1,009,418	1,036,123
Unearned premiums	948,373	920,429
Notes payable	140,000	140,000
Accounts payable and accrued expenses	113,090	96,220
Current income taxes	4,726	0
Deferred income taxes	12,755	445
Other liabilities	168,458	153,972
Total liabilities	2,396,820	2,347,189
Commitments and contingencies
Shareholders' equity:
Common stock without par value or stated value: Authorized 70,000 shares; issued and outstanding 54,922; 54,922	79,409	79,380
Retained earnings	1,795,937	1,763,117
Total shareholders’ equity	1,875,346	1,842,497
Total liabilities and shareholders’ equity	$ 4,272,166	$ 4,189,686