Condensed Consolidated Statement of Changes in Shareholders' Equity (Unaudited) (USD $) In Thousands, except Share data	Total USD ($)	Options exercised	Restricted common stock	Common Stock USD ($)	Treasury Stock USD ($)	Additional Paid-In Capital USD ($)	Accumulated Earnings USD ($)	Accumulated Other Comprehensive Income USD ($)
Beginning Balance at Dec. 31, 2011 (As previously reported)	$ 350,852			$ 194	$ (22,370)	$ 185,734	$ 185,079	$ 2,215
Beginning Balance (Cumulative effect of accounting change - deferred policy acquisition costs)	(1,415)						(1,415)
Beginning Balance at Dec. 31, 2011	349,437			194	(22,370)	185,734	183,664	2,215
Beginning Balance, Shares at Dec. 31, 2011 (As previously reported)				19,408,512	(1,258,250)
Beginning Balance, Shares at Dec. 31, 2011				19,408,512	(1,258,250)
Comprehensive income	22,026						20,127	1,899
Options exercised, shares	22,800	22,800
Options exercised, value	205					205
Tax benefit from share-based payments	132					132
Restricted common stock issued	171					171
Restricted common stock issued, shares			14,164
Share-based compensation	168					168
Ending Balance at Sep. 30, 2012	$ 372,139			$ 194	$ (22,370)	$ 186,410	$ 203,791	$ 4,114
Ending Balance, Shares at Sep. 30, 2012				19,445,476	(1,258,250)