Liability for Losses and Loss Expenses (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Liability for Losses and Loss Expenses (Textual) [Abstract]
Increase (Decrease) in liability for losses and loss expenses of prior years			$ 26,960,063
Percentage of 2010 development	3.10%		1.60%
Insurance Subsidiaries [Member]
Liability for Losses and Loss Expenses (Textual) [Abstract]
Increase (Decrease) in liability for losses and loss expenses of prior years	$ 7,600,000	$ (168,460)	$ (2,900,000)