ACCUMULATED OTHER COMPREHENSIVE INCOME - Reclassifications out of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
Net realized investment gains (losses)	$ 175,253		$ (1,138,336)	$ 2,843,126		$ 7,779,993
Income tax expense (benefit), current	(2,602,291)		1,917,316	(8,098,214)		(5,697,486)
Total reclassification adjustment	(246,172)	[1]		1,137,419	[1]
Unrealized Gains and (Losses) on Available-for-sale securities | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Net realized investment gains (losses)	175,253	[1]		2,843,126	[1]
Income tax expense (benefit), current	(61,339)	[1]		(995,094)	[1]
Total reclassification adjustment	113,914	[1]		1,848,032	[1]
Unrecognized pension and postretirement benefit obligations | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Net actuarial loss	(731,022)	[1],[2]		(1,447,340)	[1],[2]
Prior service credit	177,045	[1],[2]		354,090	[1],[2]
Total before tax	(553,977)	[1]		(1,093,250)	[1]
Income tax expense (benefit), current	193,891	[1]		382,637	[1]
Total reclassification adjustment	$ (360,086)	[1]		$ (710,613)	[1]

[1] Amounts in parentheses indicate debits to net income

[2] These accumulated other comprehensive income components are included in the computation of net periodic pension and postretirement benefit costs (see Note 6, Employee Retirement Plans, for additional details).