Fair Value (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value [Abstract]

Fair Value Measurement Levels For All Assets, Recorded At Fair And Market Value

			Fair Value Measurement Using:
			Quoted Prices
			in Active		Significant
			Markets for		Other		Significant
			Identical		Observable		Unobservable
			Assets		Inputs		Inputs
(Dollars in thousands)	September 30, 2021		(Level 1)		(Level 2)		(Level 3)
Assets:
Fixed maturities, market value
U.S. Treasury securities and obligations of U.S. government agencies and corporations	$	624,050	$	-	$	624,050	$	-
Obligations of U.S. states and political subdivisions		607,375		-		607,375		-
Corporate securities		3,751,270		-		3,027,877		723,393
Asset-backed securities		3,182,647		-		2,178,578		1,004,069
Mortgage-backed securities
Commercial		598,383		-		598,383		-
Agency residential		1,015,112		-		1,015,112		-
Non-agency residential		4,976		-		4,976		-
Foreign government securities		713,349		-		713,349		-
Foreign corporate securities		1,400,318		-		1,395,444		4,874
Total fixed maturities, market value		11,897,480		-		10,165,144		1,732,336
Equity securities, fair value		1,488,355		1,451,271		37,084		-
Other invested assets, fair value		1,933,277		-		-		1,933,277

			Fair Value Measurement Using:
			Quoted Prices
			in Active		Significant
			Markets for		Other		Significant
			Identical		Observable		Unobservable
			Assets		Inputs		Inputs
(Dollars in thousands)	December 31, 2020		(Level 1)		(Level 2)		(Level 3)
Assets:
Fixed maturities, market value
U.S. Treasury securities and obligations of U.S. government agencies and corporations	$	681,989	$	-	$	681,989	$	-
Obligations of U.S. states and political subdivisions		577,046		-		577,046		-
Corporate securities		3,449,912		-		2,819,068		630,844
Asset-backed securities		2,474,170		-		1,851,137		623,033
Mortgage-backed securities
Commercial		550,080		-		550,080		-
Agency residential		965,100		-		965,100		-
Non-agency residential		3,164		-		3,164		-
Foreign government securities		742,238		-		742,238		-
Foreign corporate securities		1,199,866		-		1,194,167		5,699
Total fixed maturities, market value		10,643,565		-		9,383,989		1,259,576
Equity securities, fair value		1,288,767		1,222,158		66,609		-
Other invested assets, fair value		1,796,479		-		-		1,796,479

Activity Under Level 3, Fair Value Measurements Using Significant Unobservable Inputs By Asset Type

	Total Fixed Maturities, Market Value
	Three Months Ended September 30, 2021								Nine Months Ended September 30, 2021
			Asset								Asset
(Dollars in thousands)	Corporate Securities		Backed Securities		Foreign Corporate		Total		Corporate Securities		Backed Securities		Foreign Corporate		Total
Beginning balance	$	634,923	$	815,276	$	4,886	$	1,455,085	$	630,843	$	623,033	$	5,700	$	1,259,576
Total gains or (losses) (realized/unrealized)
Included in earnings		3,184		(3,292)		33		(75)		(12,366)		(7,254)		173		(19,447)
Included in other comprehensive income (loss)		(1,311)		(381)		(34)		(1,726)		6,107		4,094		(70)		10,131
Purchases, issuances and settlements		86,597		192,466		(11)		279,052		98,809		384,196		(929)		482,076
Transfers in and/or (out) of Level 3		-		-		-		-		-		-		-		-
Ending balance	$	723,393	$	1,004,069	$	4,874	$	1,732,336	$	723,393	$	1,004,069	$	4,874	$	1,732,336
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date	$	761	$	(2,764)	$	-	$	(2,003)	$	(16,518)	$	(7,679)	$	-	$	(24,197)
(Some amounts may not reconcile due to rounding.)

	Total Fixed Maturities, Market Value
	Three Months Ended September 30, 2020								Nine Months Ended September 30, 2020
			Asset								Asset
(Dollars in thousands)	Corporate Securities		Backed Securities		Foreign Corporate		Total		Corporate Securities		Backed Securities		Foreign Corporate		Total
Beginning balance	$	651,186	$	295,730	$	6,274	$	953,190	$	546,939	$	153,641	$	1,751	$	702,331
Total gains or (losses) (realized/unrealized)
Included in earnings		361		457		26		844		(101)		582		(71)		410
Included in other comprehensive income (loss)		(992)		5,028		126		4,162		(4,898)		7,238		86		2,426
Purchases, issuances and settlements		(1,349)		103,574		139		102,364		112,061		243,328		3,822		359,211
Transfers in and/or (out) of Level 3		4,189		-		(863)		3,326		(606)		-		114		(492)
Ending balance	$	653,395	$	404,789	$	5,702	$	1,063,886	$	653,395	$	404,789	$	5,702	$	1,063,886
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date	$	-	$	-	$	-	$	-	$	(539)	$	-	$	-	$	(539)
(Some amounts may not reconcile due to rounding.)

	Total Fixed Maturities, Fair Value
	Three Months Ended September 30, 2020				Nine Months Ended September 30, 2020
	Foreign				Foreign
(Dollars in thousands)	Corporate		Total		Corporate		Total
Beginning balance fixed maturities at fair value	$	4,431	$	4,431	$	5,826	$	5,826
Total gains or (losses) (realized/unrealized)
Included in earnings		1,371		1,371		(24)		(24)
Included in other comprehensive income (loss)		-		-		-		-
Purchases, issuances and settlements		(2,054)		(2,054)		(2,054)		(2,054)
Transfers in and/or (out) of Level 3		-		-		-		-
Ending balance	$	3,748	$	3,748	$	3,748	$	3,748
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date	$	-	$	-	$	-	$	-
(Some amounts may not reconcile due to rounding.)

Fair Value Measurements Using Significant Unobservable Inputs for Equity Index Put Option Contracts

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(Dollars in thousands)	2021		2020		2021		2020
Equity securities
Balance, beginning of period	$	-	$	9,877	$	-	$	-
Total (gains) or losses (realized/unrealized)
Included in earnings		-		-		-		-
Included in other comprehensive income (loss)		-		-		-		-
Purchases, issuances and settlements		-		-		-		9,877
Transfers in and/or (out) of Level 3		-		(9,877)		-		(9,877)
Balance, end of period	$	-	$	-	$	-	$	-
The amount of total gains or losses for the period included in earnings
(or changes in net assets) attributable to the change in unrealized
gains or losses relating to liabilities still held at the reporting date	$	-	$	-	$	-	$	-
(Some amounts may not reconcile due to rounding.)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(Dollars in thousands)	2021		2020		2021		2020
Other invested assets, fair value:
Beginning balance	$	1,977,109	$	1,786,003	$	1,796,479	$	1,982,582
Total gains or (losses) (realized/unrealized)
Included in earnings		(43,832)		15,740		136,798		(180,839)
Included in other comprehensive income (loss)		-		-		-		-
Purchases, issuances and settlements		-		-		-		-
Transfers in and/or (out) of Level 3		-		-		-		-
Ending balance	$	1,933,277	$	1,801,743	$	1,933,277	$	1,801,743
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date	$	-	$	-	$	-	$	-
(Some amounts may not reconcile due to rounding.)