CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Investments:
Fixed maturity securities-held-to-maturity, at amortized cost (fair value $576,989 and $627,349 in 2013 and 2012, respectively)	$ 550,153	$ 583,287
Fixed maturity securities-available-for-sale, at fair value (cost $207,197 and $144,514 in 2013 and 2012, respectively)	202,701	149,139
Equity securities-available-for-sale, at fair value (cost $11,987 and $7,000 in 2013 and 2012, respectively)	12,260	6,766
Short-term investments	86,131	68,924
Other investments	10,271
Total investments	861,516	808,116
Cash and cash equivalents	116,778	92,676
Amounts recoverable from reinsurers	77,835	101,352
Premiums receivable, net of allowance	172,002	141,950
Deferred income taxes	34,672	29,521
Accrued interest receivable	10,888	10,392
Property and equipment, net	7,505	7,711
Deferred policy acquisition costs	21,085	18,419
Federal income tax recoverable	1,148
Other assets	9,130	10,809
Total assets	1,312,559	1,220,946
Liabilities:
Reserves for loss and loss adjustment expenses	609,042	570,450
Unearned premiums	164,739	140,528
Reinsurance premiums payable	781	456
Amounts held for others	31,950	41,033
Policyholder deposits	42,029	39,088
Insurance-related assessments	28,887	22,244
Accounts payable and other liabilities	29,019	25,649
Payable for investments purchased	5,400	276
Total liabilities	911,847	839,724
Shareholders' equity:
Common stock: Voting-$0.01 par value authorized shares-50,000,000 in 2013 and 2012; 19,747,430 and 19,513,476 shares issued and 18,489,180 and 18,255,226 shares outstanding in 2013 and 2012, respectively	197	195
Additional paid-in capital	190,767	187,401
Treasury stock at cost (1,258,250 shares in 2013 and 2012)	(22,370)	(22,370)
Accumulated earnings	234,789	213,017
Accumulated other comprehensive income, net	(2,671)	2,979
Total shareholders' equity	400,712	381,222
Total liabilities and shareholders' equity	$ 1,312,559	$ 1,220,946