Transactions With Affiliates (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Ceded reinsurance transactions with unaffiliated reinsurers
Premiums earned	$ 258,064,301	$ 242,186,814	$ 144,554,336
Prepaid reinsurance premiums	111,156,162	106,450,018
Atlantic States ceded [Member] | Affiliated Entity [Member]
Ceded reinsurance transactions with unaffiliated reinsurers
Premiums earned	132,876,094	118,812,725	105,376,068
Losses and loss expenses	92,459,147	97,130,846	81,203,625
Prepaid reinsurance premiums	70,572,281	64,214,378	57,783,435
Liability for losses and loss expenses	$ 83,623,652	$ 77,312,645	$ 65,028,781