Reinsurance (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Reinsurer	Dec. 31, 2011
Ceded Credit Risk [Line Items]
Reinsurance receivables due from reinsurers (in hundredths)	99.00%
Number of reinsurers	2
Summary reconciliation of premiums written and premiums earned [Abstract]
Direct premiums written	$ 130,402	$ 111,755
Plus - premiums assumed	3,003	4,499
Less - premiums ceded	(7,671)	(6,550)
Net premiums written	125,734	109,704
Change in unearned premiums	1,009	(2,233)
Net premiums earned	126,743	107,471
Provision for benefits and losses incurred	99,026	80,774
Reinsurance loss recoveries	(9,209)	(7,160)
Total insurance benefits and losses incurred	89,817	73,614
Components of reinsurance receivables [Abstract]
Receivable on unpaid losses	18,743	15,673
Receivable on paid losses	25	0
Total reinsurance receivables	18,768	15,673
Swiss Reinsurance Corporation [Member]
Ceded Credit Risk [Line Items]
Reinsurance receivables due	5,898
General Reinsurance Corporation [Member]
Ceded Credit Risk [Line Items]
Reinsurance receivables due	$ 12,754