Liability for Unpaid Loss and Loss Adjustment Expenses (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Liability for Unpaid Loss and Loss Adjustment Expenses (Textual) [Abstract]
(Favorable) Unfavorable	$ 9,038	$ 13,369	$ 356
E & S [Member]
Liability for Unpaid Loss and Loss Adjustment Expenses (Textual) [Abstract]
(Favorable) Unfavorable	(1,780)	(10,209)	(2,397)
ART [Member]
Liability for Unpaid Loss and Loss Adjustment Expenses (Textual) [Abstract]
(Favorable) Unfavorable	2,946	12,120	2,666
Reinsurance [Member]
Liability for Unpaid Loss and Loss Adjustment Expenses (Textual) [Abstract]
(Favorable) Unfavorable	8,096
Runoff [Member]
Liability for Unpaid Loss and Loss Adjustment Expenses (Textual) [Abstract]
(Favorable) Unfavorable	$ (224)	$ 2,021	$ (1,361)