Schedule VI - Supplemental Information Concerning Property-Casualty Insurance Operations (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Information for Property, Casualty Insurance Underwriters [Abstract]
Deferred policy acquisition costs	$ 37,792,442	$ 34,425,593	$ 30,849,717
Reserves for losses and settlement expenses	610,180,850	583,096,965	593,300,247
Discount, if any, deducted from reserves	0	0	0
Unearned premiums	220,627,284	196,215,465	180,689,377
Earned premiums	515,506,266	458,845,999	416,402,313
Net investment income	43,031,648	44,154,828	46,113,786
Losses and settlement expenses incurred related to current year	346,072,934	329,120,220	376,073,620
Losses and settlement expenses incurred related to prior years	(12,785,485)	(25,732,505)	(33,099,183)
Amortization of deferred policy acquisition costs	94,727,668	84,274,773	77,318,057
Paid losses and settlement expenses	305,266,843	308,137,204	313,986,687
Premiums written	$ 534,076,700	$ 478,481,485	$ 429,787,492