CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Net income (loss)	$ 15,834,277	$ 7,199,643	$ 6,212,236	$ 14,272,517	$ 12,997,921	$ 8,321,244	$ (2,576,471)	$ 19,223,735	$ 43,518,673		$ 37,966,429	$ (2,737,279)
OTHER COMPREHENSIVE INCOME (LOSS)
Change in unrealized holding gains (losses) on investment securities, net of deferred income tax expense (benefit) of ($8,390,117), $12,849,174 and $10,712,640									(15,581,644)		23,862,752	19,894,900
Reclassification adjustment for realized investment gains included in net income (loss), net of income tax expense of ($3,148,791), ($2,805,959) and ($3,286,258)									(5,847,754)		(5,211,069)	(6,103,052)
Change in unrealized holding gains on fixed maturity securities with other-than-temporary impairment, net of deferred income tax expense of $0, $0 and $7,507									0		0	13,941
Reclassification adjustment for realized investment losses from fixed maturity securities with other-than-temporary impairment included in net income (loss), net of income tax benefit of $0, $0 and $30,106									0		0	55,911
Reclassification adjustment for amounts amortized into net periodic pension and postretirement benefit cost, net of deferred income tax benefit of $765,273, $949,985 and $386,606:
Net actuarial loss									1,881,540		2,108,504	1,034,037
Prior service credit									(460,319)		(344,247)	(316,050)
Total reclassification adjustment associated with affiliate's pension and postretirement benefit plans									1,421,221		1,764,257	717,987
Change in funded status of affiliate's pension and postretirement benefit plans, net of deferred income tax expense (benefit) of $16,835,696, ($2,195) and ($6,318,661):
Net actuarial gain (loss)									13,718,056		(735,887)	(11,768,434)
Prior service credit									17,548,235		731,812	33,770
Total change in funded status of affiliate's pension and postretirement benefit plans									31,266,291		(4,075)	(11,734,664)
Other comprehensive income									11,258,114	[1]	20,411,865	2,845,023
Total comprehensive income									$ 54,776,787		$ 58,378,294	$ 107,744

[1] All amounts are net of tax. Amounts in parentheses indicate debits.