Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Available-for-sale securities at fair value:
Equity securities (cost: 2011 - $1,406,542; 2010 - $1,310,009)	$ 1,642,108	$ 1,500,686
Debt securities (amortized cost: 2011 - $2,706,761; 2010 - $2,778,117)	2,795,231	2,832,411
Short-term investments	262,445	264,811
Marketable Securities, Total	4,699,784	4,597,908
Other invested assets	198,878	207,294
Total investments	4,898,662	4,805,202
Cash	85,484	76,741
Premium balances receivable	195,985	128,075
Reinsurance recoverables	872,589	873,295
Ceded unearned premium reserves	162,773	144,065
Deferred acquisition costs	72,125	67,692
Property and equipment at cost, net of accumulated depreciation and amortization	20,269	19,504
Goodwill and other intangibles, net of amortization	140,635	142,312
Current taxes receivable	12,529
Net deferred tax assets	37,196	77,147
Other assets	117,620	97,666
Total assets	6,615,867	6,431,699
Liabilities and Stockholders' Equity
Loss and loss adjustment expenses	2,324,386	2,328,742
Unearned premiums	588,848	523,927
Senior Notes	298,979	298,923
Reinsurance payable	67,241	41,500
Current taxes payable		3,220
Other liabilities	306,964	326,519
Total liabilities	3,586,418	3,522,831
Common stock (shares authorized: 2011 and 2010 - 22,000,000; issued and outstanding 2011 - 9,117,787; 2010 - 9,300,448)	9,117	9,118
Contributed capital	937,057	928,816
Accumulated other comprehensive income	218,149	170,262
Treasury stock, at cost (2011 - 232,914 shares; 2010 - 351,532 shares)	(68,271)	(99,686)
Retained earnings	1,933,397	1,900,358
Total stockholders' equity	3,029,449	2,908,868
Liabilities and Equity, Total	$ 6,615,867	$ 6,431,699