Reinsurance Ceded Premiums Earned by type (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Ceded Premiums Earned by type [Line Items]
Ceded Premiums Written	$ (144,404,000)	$ (124,682,000)	$ (113,234,000)
Increase (Decrease) in Ceded Unearned Premiums	8,559,000	5,352,000	8,948,000
Ceded Premiums Earned	(135,845,000)	(119,330,000)	(104,286,000)
Excess of Loss Product Line [Member]
Ceded Premiums Earned by type [Line Items]
Ceded Premiums Written	(125,638,000)	(108,696,000)	(100,549,000)
Equipment and Identity Theft Product Line [Member]
Ceded Premiums Earned by type [Line Items]
Ceded Premiums Written	(4,370,000)	(2,608,000)	(1,540,000)
Flood Product Line [Member]
Ceded Premiums Earned by type [Line Items]
Ceded Premiums Written	$ (14,396,000)	$ (13,378,000)	$ (11,145,000)