Unpaid Losses and Loss Adjustment Expenses (Schedule of liability for unpaid losses and loss adjustment expenses) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Liability for Unpaid Claims and Claims Adjustment Expense, Activity in Liability [Abstract]
Liability for unpaid losses and loss adjustment expense	$ 45,890	$ 59,632
Reinsurance recoverables on losses	4,128	7,192
Net balance at beginning of period	41,762	52,440
Incurred related to:
Current year	60,152	58,917
Prior years	(582)	(4,966)
Total Incurred	59,570	53,951
Paid related to:
Current year	25,220	23,782
Prior years	16,337	20,382
Total paid	41,557	44,164
Liability for unpaid losses and loss adjustment expense	63,376	72,619
Reinsurance ceded	3,601	10,392
Net balance at end of period	$ 59,775	$ 62,227