XML 112 R94.htm IDEA: XBRL DOCUMENT v3.22.0.1
Fair Value Measurements - Pension Plan Assets within Fair Value Hierarchy (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets $ 739,789 $ 741,191 $ 714,017
US      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 389,689 404,275  
Other plan liabilities, net [1] (1,522) (7,336)  
Net plan assets 388,167 396,939  
US | Cash and Cash Equivalents      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 20,706 2,861  
US | Short-term Investments      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 25,569 9,827  
US | United States Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 40,191 66,145  
US | International Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 25,879 28,529  
US | United States Fixed Income Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 225,846 243,226  
US | International Fixed Income Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 29,300 28,501  
US | Asset Categories Other      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 22,198 25,186  
US | Quoted Prices in Active Markets (Level 1)      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 60,010 38,868  
US | Quoted Prices in Active Markets (Level 1) | Cash and Cash Equivalents      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 20,706 2,861  
US | Quoted Prices in Active Markets (Level 1) | Short-term Investments      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Quoted Prices in Active Markets (Level 1) | United States Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Quoted Prices in Active Markets (Level 1) | International Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Quoted Prices in Active Markets (Level 1) | United States Fixed Income Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 39,304 36,007  
US | Quoted Prices in Active Markets (Level 1) | International Fixed Income Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Quoted Prices in Active Markets (Level 1) | Asset Categories Other      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Significant Other Observable Inputs (Level 2)      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 316,265 349,469  
US | Significant Other Observable Inputs (Level 2) | Cash and Cash Equivalents      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Significant Other Observable Inputs (Level 2) | Short-term Investments      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 25,569 9,827  
US | Significant Other Observable Inputs (Level 2) | United States Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 40,191 66,145  
US | Significant Other Observable Inputs (Level 2) | International Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 25,879 28,529  
US | Significant Other Observable Inputs (Level 2) | United States Fixed Income Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 186,542 207,219  
US | Significant Other Observable Inputs (Level 2) | International Fixed Income Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 29,300 28,501  
US | Significant Other Observable Inputs (Level 2) | Asset Categories Other      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 8,784 9,248  
US | Significant Unobservable Inputs (Level 3)      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 13,414 15,938 14,766
US | Significant Unobservable Inputs (Level 3) | Cash and Cash Equivalents      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Significant Unobservable Inputs (Level 3) | Short-term Investments      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Significant Unobservable Inputs (Level 3) | United States Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Significant Unobservable Inputs (Level 3) | International Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Significant Unobservable Inputs (Level 3) | United States Fixed Income Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Significant Unobservable Inputs (Level 3) | International Fixed Income Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
US | Significant Unobservable Inputs (Level 3) | Asset Categories Other      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 13,414 15,938  
U.K Plan      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 312,119 303,954  
U.K Plan | Cash and Cash Equivalents      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 33,511 2,613  
U.K Plan | United States Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 44,461  
U.K Plan | International Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 7,510  
U.K Plan | Money Market Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 64,704 162,276  
U.K Plan | US Government Agencies Debt Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 141,870 42,564  
U.K Plan | Alternative strategies      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 60,779 34,958  
U.K Plan | Real Estate Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 11,255 9,572  
U.K Plan | Quoted Prices in Active Markets (Level 1)      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 37,414 2,613  
U.K Plan | Quoted Prices in Active Markets (Level 1) | Cash and Cash Equivalents      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 33,518 2,613  
U.K Plan | Quoted Prices in Active Markets (Level 1) | United States Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Quoted Prices in Active Markets (Level 1) | International Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Quoted Prices in Active Markets (Level 1) | Money Market Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Quoted Prices in Active Markets (Level 1) | US Government Agencies Debt Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Quoted Prices in Active Markets (Level 1) | Alternative strategies      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 3,896 0  
U.K Plan | Quoted Prices in Active Markets (Level 1) | Real Estate Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Significant Other Observable Inputs (Level 2)      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 263,457 291,769  
U.K Plan | Significant Other Observable Inputs (Level 2) | Cash and Cash Equivalents      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Significant Other Observable Inputs (Level 2) | United States Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 44,461  
U.K Plan | Significant Other Observable Inputs (Level 2) | International Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 7,510  
U.K Plan | Significant Other Observable Inputs (Level 2) | Money Market Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 64,704 162,276  
U.K Plan | Significant Other Observable Inputs (Level 2) | US Government Agencies Debt Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 141,870 42,564  
U.K Plan | Significant Other Observable Inputs (Level 2) | Alternative strategies      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 56,883 34,958  
U.K Plan | Significant Other Observable Inputs (Level 2) | Real Estate Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Significant Unobservable Inputs (Level 3)      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 11,255 9,572 $ 9,735
U.K Plan | Significant Unobservable Inputs (Level 3) | Cash and Cash Equivalents      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Significant Unobservable Inputs (Level 3) | United States Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Significant Unobservable Inputs (Level 3) | International Equity Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Significant Unobservable Inputs (Level 3) | Money Market Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Significant Unobservable Inputs (Level 3) | US Government Agencies Debt Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Significant Unobservable Inputs (Level 3) | Alternative strategies      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets 0 0  
U.K Plan | Significant Unobservable Inputs (Level 3) | Real Estate Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total plan assets $ 11,255 $ 9,572  
[1] net amounts payable for unsettled security transactions.