Unpaid Losses and Loss Adjustment Expenses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior-year adverse (favorable) reserve development	$ 2,593	$ (81)	$ 5,687	$ 125
Florida homeowners line
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior-year adverse (favorable) reserve development	759	(95)	2,200
Commercial automobile line
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior-year adverse (favorable) reserve development	$ 584	161	$ 2,100	696
Personal automobile line
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior-year adverse (favorable) reserve development		163		494
Commercial multi-peril line
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior-year adverse (favorable) reserve development		$ (256)		(530)
Other liability line
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior-year adverse (favorable) reserve development				(125)
Workers’ compensation line
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior-year adverse (favorable) reserve development				$ (313)