Investments (Details 5) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of gross realized gains and losses from investments before applicable income taxes
Gross realized gains	$ 7,656,384	$ 13,720,218	$ 5,928,040
Gross realized losses	796,945	1,438,951	1,532,320
Net realized investment gains	6,859,439	12,281,267	4,395,720
Fixed maturities [Member]
Summary of gross realized gains and losses from investments before applicable income taxes
Gross realized gains	6,730,331	4,959,707	4,136,455
Gross realized losses	42,135	163,316	533,918
Equity securities [Member]
Summary of gross realized gains and losses from investments before applicable income taxes
Gross realized gains	926,053	8,760,511	1,791,585
Gross realized losses	$ 754,810	$ 1,275,635	$ 998,402