Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets
Fixed maturity securities-held-to-maturity, at amortized cost (fair value $688,433 and $685,242 in 2012 and 2011, respectively)	$ 649,042	$ 646,048
Fixed maturity securities-available-for-sale, at fair value (cost $98,830 and $98,077 in 2012 and 2011, respectively)	102,022	100,742
Equity securities-available-for-sale, at fair value (cost $4,492 and $11,776 in 2012 and 2011, respectively)	4,365	12,240
Short-term investments	49,488	46,944
Total investments	804,917	805,974
Cash and cash equivalents	63,775	45,536
Amounts recoverable from reinsurers	99,945	96,212
Premiums receivable, net	138,366	121,223
Deferred income taxes	29,888	30,048
Accrued interest receivable	10,340	9,520
Property and equipment, net	7,456	7,628
Deferred policy acquisition costs	17,675	16,578
Deferred charges	3,388	3,120
Federal income tax recoverable	659
Other assets	9,351	11,254
Total assets	1,185,760	1,147,093
Liabilities:
Reserves for loss and loss adjustment expenses	548,959	538,214
Unearned premiums	129,929	118,699
Reinsurance premiums payable	457	1,226
Amounts held for others	32,897	29,981
Policyholder deposits	36,972	37,228
Insurance-related assessments	22,788	21,506
Payable for investments purchased	4,704	616
Accounts payable and other liabilities	24,221	24,406
Subordinated debt securities	25,780	25,780
Total liabilities	826,707	797,656
Shareholders' equity:
Voting-$0.01 par value authorized shares-50,000,000 in 2012 and 2011; 19,408,512 shares issued and 18,150,262 shares outstanding in 2012 and 2011	194	194
Additional paid-in capital	185,842	185,734
Treasury stock at cost (1,258,250 shares in 2012 and 2011)	(22,370)	(22,370)
Accumulated earnings	193,225	183,664
Accumulated other comprehensive income, net	2,162	2,215
Total shareholders' equity	359,053	349,437
Total liabilities and shareholders' equity	$ 1,185,760	$ 1,147,093