Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Investments:
Fixed maturity securities-held-to-maturity, at amortized cost (fair value $654,175 and $685,242 in 2012 and 2011, respectively)	$ 607,681	$ 646,048
Fixed maturity securities-available-for-sale, at fair value (cost $141,541 and $98,077 in 2012 and 2011, respectively)	147,131	100,742
Equity securities available-for-sale, at fair value (cost $6,592 and $11,776 in 2012 and 2011, respectively)	7,117	12,240
Short-term investments	51,345	46,944
Total investments	813,274	805,974
Cash and cash equivalents	69,345	45,536
Amounts recoverable from reinsurers	98,154	96,212
Premiums receivable, net	143,202	121,223
Deferred income taxes	31,417	30,048
Accrued interest receivable	9,846	9,520
Property and equipment, net	7,665	7,628
Deferred policy acquisition costs	18,830	16,578
Federal income tax recoverable	463
Other assets	10,659	11,254
Total assets	1,202,855	1,143,973
Liabilities:
Reserves for loss and loss adjustment expenses	564,243	538,214
Unearned premiums	142,527	118,699
Reinsurance premiums payable	273	1,226
Amounts held for others	38,163	29,981
Policyholder deposits	37,744	37,228
Insurance-related assessments	22,190	19,071
Payable for investments purchased	1,264	616
Accounts payable and other liabilities	24,312	23,721
Subordinated debt securities		25,780
Total liabilities	830,716	794,536
Shareholders' equity:
Common stock: Voting $0.01 par value authorized shares 50,000,000 in 2012 and 2011; 19,445,476 and 19,408,512 shares issued and 18,187,226 and 18,150,262 shares outstanding in 2012 and 2011, respectively	194	194
Additional paid-in capital	186,410	185,734
Treasury stock at cost (1,258,250 shares in 2012 and 2011)	(22,370)	(22,370)
Accumulated earnings	203,791	183,664
Accumulated other comprehensive income, net	4,114	2,215
Total shareholders' equity	372,139	349,437
Total liabilities and shareholders' equity	$ 1,202,855	$ 1,143,973