Schedule III -Supplementary Insurance Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred Policy Acquisition Costs	$ 24,911	$ 22,554	$ 20,933
Future Policy Benefits, Losses, Claims and Loss Adjustment Expenses	313,416	296,945	251,677
Unearned Premiums	162,502	146,104	140,965
Other Policy Claims and Benefits Payable	0	0	0
Premium Revenue	319,436	293,041	278,271
Net Investment Income	15,293	15,880	14,849
Benefits Claims, Losses and Settlement Expenses	226,414	239,235	202,544
Amortization of Deferred Policy Acquisition Costs	59,805	47,775	55,994
Other Operating Expenses	106,150	96,728	88,876
Net Premiums Written	332,489	303,876	281,641
Personal Segment [Member]
Deferred Policy Acquisition Costs	4,952	6,020	5,685
Future Policy Benefits, Losses, Claims and Loss Adjustment Expenses	40,387	53,280	50,768
Unearned Premiums	21,125	26,307	33,152
Other Policy Claims and Benefits Payable	0	0	0
Premium Revenue	81,451	92,962	88,602
Net Investment Income	2,449	2,470	2,135
Benefits Claims, Losses and Settlement Expenses	69,606	101,030	72,165
Amortization of Deferred Policy Acquisition Costs	17,250	13,865	23,293
Other Operating Expenses	26,413	29,706	26,855
Net Premiums Written	76,345	95,655	95,096
Standard Commercial Segment [Member]
Deferred Policy Acquisition Costs	5,968	5,976	5,913
Future Policy Benefits, Losses, Claims and Loss Adjustment Expenses	103,610	100,487	84,524
Unearned Premiums	35,073	32,854	33,134
Other Policy Claims and Benefits Payable	0	0	0
Premium Revenue	69,155	64,586	65,571
Net Investment Income	4,925	4,061	4,475
Benefits Claims, Losses and Settlement Expenses	52,828	50,940	51,468
Amortization of Deferred Policy Acquisition Costs	10,825	12,721	12,815
Other Operating Expenses	22,742	20,589	20,128
Net Premiums Written	70,091	63,944	63,572
Specialty Commercial Segment [Member]
Deferred Policy Acquisition Costs	13,991	10,558	9,335
Future Policy Benefits, Losses, Claims and Loss Adjustment Expenses	169,419	143,178	116,385
Unearned Premiums	106,304	86,943	74,679
Other Policy Claims and Benefits Payable	0	0	0
Premium Revenue	168,830	135,493	124,098
Net Investment Income	9,435	7,416	7,073
Benefits Claims, Losses and Settlement Expenses	103,980	87,265	78,911
Amortization of Deferred Policy Acquisition Costs	31,730	21,189	19,886
Other Operating Expenses	49,170	39,471	34,933
Net Premiums Written	186,053	144,277	122,973
Corporate [Member]
Deferred Policy Acquisition Costs	0	0	0
Future Policy Benefits, Losses, Claims and Loss Adjustment Expenses	0	0	0
Unearned Premiums	0	0	0
Other Policy Claims and Benefits Payable	0	0	0
Premium Revenue	0	0	0
Net Investment Income	(1,516)	1,933	1,166
Benefits Claims, Losses and Settlement Expenses	0	0	0
Amortization of Deferred Policy Acquisition Costs	0	0	0
Other Operating Expenses	7,825	6,962	6,960
Net Premiums Written	$ 0	$ 0	$ 0