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Fair Value (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value [Abstract]

Fair Value Measurement Levels For All Assets And Liabilities

					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		$	1,367,106		$	-		$	1,367,106		$	-
Obligations of U.S. States and political subdivisions			577,295			-			577,295			-
Corporate securities			7,149,026			-			6,447,534			701,492
Asset-backed securities			2,565,802			-			1,942,769			623,033
Mortgage-backed securities
Commercial			990,303			-			990,303			-
Agency residential			2,267,739			-			2,267,739			-
Non-agency residential			5,194			-			5,194			-
Foreign government securities			1,645,375			-			1,645,375			-
Foreign corporate securities			3,472,333			-			3,466,634			5,699
Total fixed maturities, market value			20,040,173			-			18,709,949			1,330,224
Equity securities, fair value			1,472,236			1,368,704			103,532			-

					Fair Value Measurement Using:
					Quoted Prices
					in Active			Significant
					Markets for			Other			Significant
					Identical			Observable			Unobservable
					Assets			Inputs			Inputs
(Dollars in thousands)		December 31, 2019			(Level 1)			(Level 2)			(Level 3)
Assets:
Fixed maturities, market value
U.S. Treasury securities and obligations of
U.S. government agencies and corporations		$	1,515,803		$	-		$	1,515,803		$	-
Obligations of U.S. States and political subdivisions			536,915			-			536,915			-
Corporate securities			6,374,946			-			5,757,358			617,588
Asset-backed securities			897,333			-			743,692			153,641
Mortgage-backed securities
Commercial			844,557			-			844,557			-
Agency residential			2,198,581			-			2,198,581			-
Non-agency residential			5,703			-			5,703			-
Foreign government securities			1,505,950			-			1,505,950			-
Foreign corporate securities			2,945,156			-			2,943,406			1,750
Total fixed maturities, market value			16,824,944			-			16,051,965			772,979
Fixed maturities, fair value			5,826			-			-			5,826
Equity securities, fair value			931,457			864,584			66,873			-

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

			Total Fixed Maturities, Market Value
		December 31, 2020												December 31, 2019
		Corporate			Asset-Backed			Foreign						Corporate			Asset-Backed			Foreign
(Dollars in thousands)		Securities			Securities			Corporate			Total			Securities			Securities			Corporate			Total
Beginning balance fixed maturities at market value		$	617,588		$	153,641		$	1,750		$	772,979		$	428,215		$	-		$	7,744		$	435,959
Total gains or (losses) (realized/unrealized)
Included in earnings			1,216			681			(125)			1,772			4,937			-			(12)			4,925
Included in other comprehensive income (loss)			(1,115)			11,678			147			10,710			(20)			3,632			(110)			3,502
Purchases, issuances and settlements			84,840			457,033			3,814			545,687			179,761			150,009			(5,872)			323,898
Transfers in and/or (out) of Level 3			(1,037)			-			113			(924)			4,695			-			-			4,695
Ending balance		$	701,492		$	623,033		$	5,699		$	1,330,224		$	617,588		$	153,641		$	1,750		$	772,979
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
	December 31, 2020						December 31, 2019
		Foreign						Foreign
(Dollars in thousands)			Corporate		Total			Corporate			Total
Beginning balance fixed maturities at market value		$	5,826		$	5,826		$	2,337		$	2,337
Total gains or (losses) (realized/unrealized)
Included in earnings			(919)			(919)			2,163			2,163
Included in other comprehensive income (loss)			-			-			-			-
Purchases, issuances and settlements			(4,907)			(4,907)			1,326			1,326
Transfers in and/or (out) of Level 3			-			-			-			-
Ending balance		$	-		$	-		$	5,826		$	5,826
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		$	-		$	-		$	1,795		$	1,795
(Some amounts may not reconcile due to rounding.)

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

		Years Ended December 31,
(Dollars in thousands)	2020			2019
Common Stock
Balance, beginning of period	$	-		$	-
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)			-
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.)

X

- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 11
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- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258

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