The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 7) - 10K (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Amount Reclassified from Accumulated Other Comprehensive Earnings
Net realized investment gains									$ 32,182	$ 22,036	$ 26,528
Other-than-temporary-impairment losses on investments											(1,156)us-gaap_ImpairmentOfInvestments
Earnings before income taxes	46,479	48,594	52,423	41,991	40,812	55,309	43,576	35,969	189,487	175,666	142,732
Income tax expense									(54,042)us-gaap_IncomeTaxExpenseBenefit	(49,411)us-gaap_IncomeTaxExpenseBenefit	(39,386)us-gaap_IncomeTaxExpenseBenefit
Net earnings	37,497	33,254	35,725	28,969	33,859	37,647	29,902	24,847	135,445	126,255	103,346
Reclassifications out of accumulated other comprehensive earnings \| Unrealized Gains and Losses on Available-for-Sale Securities
Amount Reclassified from Accumulated Other Comprehensive Earnings
Net realized investment gains									33,423	22,871	29,209
Other-than-temporary-impairment losses on investments											(1,156)
Earnings before income taxes									33,423	22,871	28,053
Income tax expense									(11,698)	(8,005)	(9,819)
Net earnings									$ 21,725	$ 14,866	$ 18,234