Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Available-for-sale securities at fair value:
Equity securities	$ 870,950		$ 1,500,686
Debt securities	2,679,528		2,832,411
Short-term investments	1,096,517		264,811
Marketable Securities, Total	4,646,995		4,597,908
Other invested assets	179,815		207,294
Total investments	4,826,810		4,805,202
Cash	84,749		76,741
Premium balances receivable	147,006		128,075
Reinsurance recoverables	852,845	[1],[2]	873,295
Ceded unearned premium reserves	142,946		144,065
Deferred acquisition costs	70,537		67,692
Property and equipment at cost, net of accumulated depreciation and amortization	17,906		19,504
Goodwill	48,095	[3]	48,095	[3]
Intangible assets, net of amortization	90,863	[3]	94,217	[3]
Net deferred tax assets	80,975		77,147
Other assets	115,357		97,666
Total assets	6,478,089		6,431,699
Liabilities and Stockholders' Equity
Loss and loss adjustment expenses	2,313,035		2,328,742
Unearned premiums	549,740		523,927
Senior Notes	299,035		298,923
Reinsurance payable	45,462		41,500
Current taxes payable	16,247		3,220
Other liabilities	328,893		326,519
Total liabilities	3,552,412		3,522,831
Common stock (shares authorized: 2011 and 2010 - 22,000,000; issued and outstanding 2011 - 9,117,787; 2010 - 9,300,448)	9,118		9,118
Contributed capital	938,037		928,816
Accumulated other comprehensive income	155,532		170,262
Treasury stock, at cost (2011 - 566,141 shares; 2010 - 351,532 shares)	(167,319)		(99,686)
Retained earnings	1,990,309		1,900,358
Total stockholders' equity	2,925,677		2,908,868
Liabilities and Equity, Total	$ 6,478,089		$ 6,431,699

[1] Approximately 99.0 percent of AIHL's reinsurance recoverables balance as of December 31, 2011 was due from reinsurers having an A.M. Best financial strength rating of A (Excellent) or higher.

[2] Reinsurance recoverables reflect amounts due from one or more reinsurance subsidiaries of the listed company.

[3] Goodwill and intangible assets exclude amounts written down in prior years.