SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 2013

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Schedule of reconciliation of numerator and denominator of the basic and diluted earnings per share computations

	For the Three-Month Period					For the Three-Month Period
	Ended March 31, 2013					Ended March 31, 2012
(in thousands, except	Income		Shares	Per Share		Income		Shares	Per Share
per share data)	(Numerator)		(Denominator)	Amount		(Numerator)		(Denominator)	Amount
Basic EPS
Income available to common shareholders	$	24,847	21,272	$	1.17	$	28,038	21,188	$	1.32
Effect of Dilutive Securities
Stock options	—		351			—		340
Diluted EPS
Income available to common shareholders	$	24,847	21,623	$	1.15	$	28,038	21,528	$	1.30

Schedule of changes in the balance of each component of accumulated other comprehensive earnings

	For the Three-Month Period			For the Three-Month Period
(in thousands)	Ended March 31, 2013			Ended March 31, 2012
Unrealized Gains and Losses on Available-for-Sale Securities
Beginning balance	$	143,170		$	117,325
Other comprehensive earnings before reclassifications	20,267			19,509
Amounts reclassified from accumulated other comprehensive earnings	(2,714		)	(8,733		)
Net current-period other comprehensive earnings	$	17,553		$	10,776
Ending balance	$	160,723		$	128,101

Schedule of effects of reclassifications out of accumulated other comprehensive earnings

	Amount Reclassified from Accumulated Other Comprehensive Earnings (in thousands)
Component of Accumulated	For the Three-Months			For the Three-Months			Affected line item in the
Other Comprehensive Earnings	Ended March 31, 2013			Ended March 31, 2012			Statement of Earnings
Unrealized gains and losses on available-for-sale securities
	$	4,176		$	13,436		Net realized investment gains
	—			—			Other-than-temporary impairment (OTTI) losses on investments
	4,176			13,436			Earnings before income taxes
	(1,462		)	(4,703		)	Income tax expense
	$	2,714		$	8,733		Net earnings