Organization and Business (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Carrier Agent	Sep. 30, 2013
Business Organization [Line Item]
Years in business (minimum)			20 years
Number of independent agents			3,600
Number of agents that actively sell and service the entity's products			2,100
Percentage of entire homeowners' book the entity agreed to maintain its homeowners' policies within Tri-county area (in hundredths)			35.00%
Percentage of homeowners' policies located within Tri-County Area (in hundredths)			19.00%
Percentage of gross written premium the managing general agency fees were traditionally (in hundredths)			6.00%
Percentage of gross written premiums the managing general agency fees will not exceed (in hundredths)			4.00%
Percentage of gross written premiums the managing general agency fees minimum (in hundredths)			2.00%
Percentage of gross written premiums the managing general agency fees maximum (in hundredths)			4.00%
Percentage of gross earned premiums the claims service fees were traditionally (in hundredths)			4.50%
Percentage of gross earned premiums the claims service fees are currently (in hundredths)			3.60%
Ratio of homeowners' premiums underwritten to total premiums underwritten (in hundredths)	90.50%	89.10%	91.20%	89.00%
Ratio of commercial general liability premiums underwritten to total premiums underwritten (in hundredths)	3.40%	4.30%	3.40%	4.60%
Ratio of federal flood premiums underwritten to total premiums underwritten (in hundredths)	2.50%	2.90%	2.20%	2.80%
Ratio of automobile insurance premiums underwritten to total premiums underwritten (in hundredths)	3.60%	3.70%	3.20%	3.60%
Portion of Homeowners' Gross Premium Written Produced Under the Agreement With "ISA"	$ 19,000,000	$ 10,900,000	$ 49,400,000	$ 19,100,000
Percentage of Homeowners' Gross Premium Written Produced Under the Agreement With "ISA" (in hundredths)	22.80%	20.10%	19.30%	12.20%
Homeowners' Gross Premiums Written	83,300,000	54,100,000	255,900,000	156,400,000
Percentage of total increase in sale of Homeowners' policy related to ISA (in hundredths)	65.10%		49.70%
Fees earned per policy			$ 25
Percentage commission fee from its affiliate (in hundredths)			6.00%
Number of carriers the entity provides insurance through			40
Minimum [Member]
Business Organization [Line Item]
Percentage commission fee from its affiliate			2.00%
Maximum [Member]
Business Organization [Line Item]
Percentage commission fee from its affiliate			4.00%