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Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2022

Defined Benefit Plan Disclosure [Line Items]

Schedule of Funded Status Of Retirement Income Plan And Retirement Life Plan

December 31,						Pension Plan
($ in thousands)						2022						2021
Change in Benefit Obligation:
Benefit obligation, beginning of year						$	407,758					425,161
Interest cost						9,944						8,593
Actuarial gains						(91,653)						(12,844)
Benefits paid						(14,104)						(13,152)
Benefit obligation, end of year						$	311,945					407,758
Change in Fair Value of Assets:
Fair value of assets, beginning of year						$	450,305					432,716
Actual return on plan assets, net of expenses						(93,227)						30,741
Benefits paid						(14,104)						(13,152)
Fair value of assets, end of year						$	342,974					450,305
Funded status						$	31,029					42,547

Schedule of Amounts Recognized in Consolidated Balance Sheet

Amounts Recognized in the Consolidated Balance Sheet:
Net pension assets, end of year						$	31,029					42,547

Schedule of Amounts recognized in Accumulated Other than Comprehensive Income

Amounts Recognized in AOCI:
Net actuarial loss						$	100,561					78,304

Schedule of Other Information as of December 31

Other Information as of December 31:
Accumulated benefit obligation						$	311,945					407,758

Schedule of Components Of Net Periodic Benefit Cost And Other Amounts Recognized In Other Comprehensive Income

						Pension Plan
($ in thousands)						2022						2021						2020
Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income:
Net Periodic Benefit Cost (Benefit):
Interest cost						$	9,944					8,593						11,312
Expected return on plan assets						(22,147)						(22,976)						(21,907)
Amortization of unrecognized actuarial loss						1,465						2,501						2,817
Total net periodic pension cost (benefit)1						$	(10,738)					(11,882)						(7,778)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income:
Net actuarial loss (gain)						$	23,722					(20,609)						(2,894)
Reversal of amortization of net actuarial loss						(1,465)						(2,501)						(2,817)
Total recognized in other comprehensive income						$	22,257					(23,110)						(5,711)
Total recognized in net periodic benefit cost and other comprehensive income						$	11,519					(34,992)						(13,489)

Schedule Of Weighted- Average Expense and Liability Assumptions

Weighted-Average Liability Assumptions as of December 31:
Discount rate						5.21		%				2.98

						Pension Plan
						2022						2021						2020
Weighted-Average Expense Assumptions for the years ended December 31:
Discount rate						2.98		%				2.68		%				3.33		%
Interest rate						2.48		%				2.06		%				2.95		%
Expected return on plan assets						5.00						5.40						5.80

Schedule of Allocation of Plan Assets

						2022															2021
						Target Percentage									Actual Percentage						Actual Percentage
						Minimum			Maximum
Return seeking assets1						50		%	80		%				71		%				66		%
Liability hedging assets						20		%	50		%				27		%				33		%
Short-term investments						-			-						2		%				1		%
Total															100		%				100		%

Schedule of Quantitative Disclosures of our Financial Assets that were Measured at Fair Value

December 31, 2022												Fair Value Measurements Using
($ in thousands)						Assets Measured at Fair Value						Quoted Prices in Active Markets for Identical Assets/ Liabilities (Level 1)						Significant Other Observable Inputs (Level 2)						Significant Unobservable Inputs  (Level 3)
Description
Measured on a recurring basis:
AFS fixed income securities:
U.S. government and government agencies						$	189,239					109,240						79,999						—
Foreign government						9,608						—						9,608						—
Obligations of states and political subdivisions						918,018						—						911,357						6,661
Corporate securities						2,335,025						—						2,147,045						187,980
CLO and other ABS						1,485,973						—						1,332,631						153,342
RMBS						1,059,832						—						1,059,832						—
CMBS						614,412						—						614,037						375
Total AFS fixed income securities						6,612,107						109,240						6,154,509						348,358
Equity securities:
Common stock1						160,355						55,846						—						897
Preferred stock						1,645						1,645						—						—
Total equity securities						162,000						57,491						—						897
Short-term investments						440,456						418,199						22,257						—
Total assets measured at fair value						$	7,214,563					584,930						6,176,766						349,255

December 31, 2021												Fair Value Measurements Using
($ in thousands)						Assets Measured at Fair Value						Quoted Prices in Active Markets for Identical Assets/ Liabilities (Level 1)						Significant Other Observable Inputs (Level 2)						Significant Unobservable Inputs  (Level 3)
Description
Measured on a recurring basis:
AFS fixed income securities:
U.S. government and government agencies						$	130,458					60,615						69,843						—
Foreign government						15,860						—						15,860						—
Obligations of states and political subdivisions						1,189,308						—						1,181,563						7,745
Corporate securities						2,573,603						—						2,459,476						114,127
CLO and other ABS						1,350,814						—						1,225,905						124,909
RMBS						776,252						—						776,007						245
CMBS						673,681						—						669,425						4,256
Total AFS fixed income securities						6,709,976						60,615						6,398,079						251,282
Equity securities:
Common stock1						333,449						249,846						—						—
Preferred stock						2,088						2,088						—						—
Total equity securities						335,537						251,934						—						—
Short-term investments						447,863						442,723						5,140						—
Total assets measured at fair value						$	7,493,376					755,272						6,403,219						251,282

1Investments amounting to $103.6 million and $83.6 million at December 31, 2022 and December 31, 2021, respectively, were measured at fair value using the net asset value per share (or its practical expedient) and have not been classified in the fair value hierarchy. These investments are not redeemable and the timing of liquidations of the underlying assets is unknown at each reporting period. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to total assets measured at fair value.

Schedule of Expected Benefit Payments

Payments

($ in thousands)						Pension Plan
Benefits Expected to be Paid in Future
Fiscal Years:
2023						$	16,925
2024						17,265
2025						18,317
2026						19,391
2027						20,328
2028-2032						111,842

Retirement Income Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Quantitative Disclosures of our Financial Assets that were Measured at Fair Value

December 31, 2022												Fair Value Measurements at 12/31/22 Using
($ in thousands)						Assets Measured at Fair Value At 12/31/22						Quoted Prices in Active Markets for Identical Assets/ Liabilities (Level 1)						Significant Other Observable Inputs (Level 2)						Significant Unobservable Inputs (Level 3)
Description
Return seeking assets:
Equities:
Global equity						$	63,852					63,852						—						—
Diversified credit						58,761						58,761						—						—
Real assets						95,396						95,396						—						—
Liquid diversifiers1						23,978						23,978						—						—
Total equities						241,987						241,987						—						—
Limited partnerships (at net asset value)2:
Real assets						27						—						—						—
Private equity						331						—						—						—
Total limited partnerships						358						—						—						—
Total return seeking assets						242,345						241,987						—						—
Liability hedging assets:
Fixed income						35,378						35,378						—						—
U.S. Treasury overlay						56,255						56,255						—						—
Total liability hedging assets						91,633						91,633						—						—
Cash and short-term investments:
Short-term investments						5,108						5,108						—						—
Deposit administration contracts						2,740						—						2,740						—
Total cash and short-term investments						7,848						5,108						2,740						—
Total invested assets						$	341,826					338,728						2,740						—

December 31, 2021												Fair Value Measurements at 12/31/21 Using
($ in thousands)						Assets Measured at Fair Value At 12/31/21						Quoted Prices in Active Markets for Identical Assets/ Liabilities (Level 1)						Significant Other Observable Inputs (Level 2)						Significant Unobservable Inputs (Level 3)
Description
Return seeking assets:
Equities:
Global equity						$	144,634					144,634						—						—
Diversified credit						66,165						66,165						—						—
Real assets						89,590						89,590						—						—
Total equities						300,389						300,389						—						—
Limited partnerships (at net asset value)2:
Real assets						47						—						—						—
Private equity						413						—						—						—
Total limited partnerships						460						—						—						—
Total return seeking assets						300,849						300,389						—						—
Liability hedging assets:
Fixed income						86,183						86,183						—						—
U.S. Treasury overlay						65,304						65,304						—						—
Total liability hedging assets						151,487						151,487						—						—
Cash and short-term investments:
Short-term investments						1,744						1,744						—						—
Deposit administration contracts						2,422						—						2,422						—
Total cash and short-term investments						4,166						1,744						2,422						—
Total invested assets						$	456,502					453,620						2,422						—

1 Liquid diversifiers are investments that unbundle return drivers from hedge funds, providing investors access to liquid, diversifying returns.

2In accordance with the FASB issued ASU 2015-07, Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent), certain investments that are measured at fair value using the net asset value per share (or its practical expedient) have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to total Pension Plan invested assets.

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