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Employee Benefit Plans - Summary of Changes in Fair Value of Level 3 Investments (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Defined Benefit Plan, Alternative Investments, Fair Value of Plan Assets [1] $ 0 $ 4,946
Fair Value, Inputs, Level 1, 2 and 3    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Fair Value of Plan Assets, Excluding Net Asset Value Investments [2] 49,432 41,257
Fair Value Measured at Net Asset Value Per Share    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year 46,203  
Balance, end of year 49,432 46,203
Investments in equity securities    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year 19,706  
Balance, end of year 24,648 19,706
Debt securities    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year 17,612  
Balance, end of year 24,228 17,612
Other Investments [Member]    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year 3,939  
Balance, end of year 556 3,939
Us Large Cap Equity Securities | Investments in equity securities    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year [3] 3,413  
Balance, end of year [3] 15,360 3,413
Us Mid Cap Equity Securities | Investments in equity securities    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year [3] 1,425  
Balance, end of year [3] 4,271 1,425
United States Equity Small Cap | Investments in equity securities    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year [3] 692  
Balance, end of year [3] 2,518 692
International All Cap Equity | Investments in equity securities    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year [4] 9,352  
Balance, end of year [4] 2,499 9,352
Alternative Strategies | Investments in equity securities    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year [5] 4,824  
Balance, end of year [5] 0 4,824
Fixed Income Securities [Member] | Debt securities    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year [6] 15,343  
Balance, end of year [6] 24,228 15,343
High Yield Asset Backed Securities | Debt securities    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year [6] 2,269  
Balance, end of year [6] 0 2,269
Commodities | Other Investments [Member]    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year [7] 1,832  
Balance, end of year [7] 0 1,832
Real Estate [Member] | Other Investments [Member]    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year [8] 1,709  
Balance, end of year [8] 0 1,709
Guaranteed deposit | Other Investments [Member]    
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Balance, beginning of year [9] 398  
Balance, end of year [9] $ 556 $ 398
[1] Certain investments that were measured at net asset value per share have not been classified in the fair value hierarchy. These amounts are presented to reconcile to total pension plan assets.
[2]
(8) All investments in the FPU Pension Plan are classified as Level 1 within the Fair Value hierarchy exclusive of the Guaranteed Deposit Account which is classified as Level 3.
[3] Includes funds that invest primarily in United States common stocks.
[4] Includes funds that invest primarily in foreign equities and emerging markets equities.
[5] Includes funds that actively invest in both equity and debt securities, funds that sell short securities and funds that provide long-term capital appreciation. The funds may invest in debt securities below investment grade.
[6] Includes funds that invest in investment grade and fixed income securities.
[7] Includes funds that invest primarily in commodity-linked derivative instruments and fixed income securities.
[8] Includes funds that invest primarily in real estate.
[9] 7) Includes investment in a group annuity product issued by an insurance company.