CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
REVENUES
Premiums earned, affiliated	$ 509,703,737	$ 452,334,205	$ 410,955,792
LOSSES AND EXPENSES
Losses and settlement expenses, affiliated	326,129,688	298,798,399	338,658,534
Amortization of deferred policy acquisition costs, affiliated	93,115,663	82,539,551	75,900,854
Other underwriting expenses, affiliated	65,574,694	60,981,322	54,541,637
Other expense, affiliated	$ 1,347,885	$ 2,044,343	$ 2,830,745