Reinsurance (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reinsurance [Abstract]
Premiums ceded to reinsurers	$ 32,822	$ 28,711	$ 95,397	$ 91,345
Losses and loss expenses ceded to reinsurers	21,068	15,451	59,306	54,473
Commissions from reinsurers	$ 6,668	$ 5,850	$ 21,713	$ 17,425