ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)

12 Months Ended

Dec. 31, 2019

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Summary of changes in the accumulated balances for each component of accumulated other comprehensive income (loss)

The following table summarizes the changes in the accumulated balances for each component of AOCI as of December 31, 2019, 2018, and 2017.

Changes in Accumulated Other Comprehensive Income (Loss) by Component

	Unrealized Gains and Losses on Investments(2)		Accumulated Gain and Loss on Derivatives		Total Accumulated Other Comprehensive Income (Loss)
	(Dollars In Thousands, Net of Tax)
Balance, December 31, 2016	$	(655,767)	$	727	$	(655,040)
Other comprehensive income (loss) before reclassifications	705,859		(563)		705,296
Other comprehensive income (loss) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings	391		—		391
Amounts reclassified from accumulated other comprehensive income (loss)(1)	(944)		451		(493)
Cumulative effect adjustments	(26,470)		132		(26,338)
Balance, December 31, 2017	$	23,069	$	747	$	23,816
Other comprehensive income (loss) before reclassifications	(1,411,674)		(1,884)		(1,413,558)
Other comprehensive income (loss) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings	(20,751)		—		(20,751)
Amounts reclassified from accumulated other comprehensive income (loss)(1)	15,699		1,130		16,829
Cumulative effect adjustments	(10,552)		—		(10,552)
Balance, December 31, 2018	$	(1,404,209)	$	(7)	$	(1,404,216)
Other comprehensive income (loss) before reclassifications	2,833,888		(9,781)		2,824,107
Other comprehensive income (loss) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings	(3,574)		—		(3,574)
Amounts reclassified from accumulated other comprehensive income (loss)(1)	(10,474)		1,799		(8,675)
Balance, December 31, 2019	$	1,415,631	$	(7,989)	$	1,407,642

(1)See Reclassification table below for details.

(2)As of December 31, 2017, 2018 and 2019, net unrealized losses reported in AOCI were offset by $(6.3) million, $613.4 million and $(776.9) million, respectively, due to the impact those net unrealized losses would have had on certain of the Company’s insurance assets and liabilities if the net unrealized losses had been recognized in net income.

Schedule of reclassifications amounts out of AOCI

The following tables summarize the reclassifications amounts out of AOCI for the years ended December 31, 2019, 2018, and 2017.

Gains/(losses) in net income:	Affected Line Item in the Consolidated Statements of Income	For The Year Ended December 31,
		2019		2018		2017
		(Dollars In Thousands)
Derivative instruments	Benefits and settlement expenses, net of reinsurance ceded(1)	$	(2,278)	$	(1,431)	$	(694)
	Tax (expense) benefit	479		301		243
		$	(1,799)	$	(1,130)	$	(451)
Unrealized gains and losses on available-for-sale securities	Realized investment gains (losses): All other investments	$	47,711	$	9,851	$	10,453
	Net impairment losses recognized in earnings	(34,453)		(29,724)		(9,112)
	Tax (expense) or benefit	(2,784)		4,174		(397)
		$	10,474	$	(15,699)	$	944
(1) See Note 7, Derivative Financial Instruments for additional information