Fair Value Measurements - Assets of Defined Benefit Pension Plans (Details) - USD ($) $ in Thousands | 12 Months Ended | | |
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | $ 714,017 | $ 649,688 | $ 714,017 | $ 649,688 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 649,688 | 708,895 | | |
Actual return on plan assets: | | | | |
End of measurement period | 714,017 | 649,688 | | |
U.S. | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 403,144 | 347,705 | 403,144 | 347,705 |
Other plan liabilities, net | | | (26,220) | 0 |
Fair value of net plan assets | | | 376,924 | 347,705 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 347,705 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 403,144 | 347,705 | | |
U.S. | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 59,329 | 40,993 | 59,329 | 40,993 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 40,993 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 59,329 | 40,993 | | |
U.S. | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 329,049 | 290,224 | 329,049 | 290,224 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 290,224 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 329,049 | 290,224 | | |
U.S. | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 14,766 | 16,488 | 14,766 | 16,488 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 16,488 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 14,766 | 16,488 | | |
U.S. | Cash and cash equivalents | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 8,082 | 2,274 | 8,082 | 2,274 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 2,274 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 8,082 | 2,274 | | |
U.S. | Cash and cash equivalents | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 8,082 | 2,274 | 8,082 | 2,274 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 2,274 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 8,082 | 2,274 | | |
U.S. | Cash and cash equivalents | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | Cash and cash equivalents | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | Short-term investment funds | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 5,496 | 5,005 | 5,496 | 5,005 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 5,005 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 5,496 | 5,005 | | |
U.S. | Short-term investment funds | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | Short-term investment funds | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 5,496 | 5,005 | 5,496 | 5,005 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 5,005 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 5,496 | 5,005 | | |
U.S. | Short-term investment funds | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | U.S. equity securities | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 60,039 | 52,882 | 60,039 | 52,882 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 52,882 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 60,039 | 52,882 | | |
U.S. | U.S. equity securities | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | U.S. equity securities | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 60,039 | 52,882 | 60,039 | 52,882 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 52,882 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 60,039 | 52,882 | | |
U.S. | U.S. equity securities | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | International equity securities | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 26,142 | 22,747 | 26,142 | 22,747 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 22,747 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 26,142 | 22,747 | | |
U.S. | International equity securities | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | International equity securities | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 26,142 | 22,747 | 26,142 | 22,747 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 22,747 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 26,142 | 22,747 | | |
U.S. | International equity securities | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | U.S. fixed income funds | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 275,994 | 221,871 | 275,994 | 221,871 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 221,871 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 275,994 | 221,871 | | |
U.S. | U.S. fixed income funds | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 51,247 | 38,719 | 51,247 | 38,719 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 38,719 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 51,247 | 38,719 | | |
U.S. | U.S. fixed income funds | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 224,747 | 183,152 | 224,747 | 183,152 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 183,152 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 224,747 | 183,152 | | |
U.S. | U.S. fixed income funds | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | International fixed income funds | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 3,745 | 17,523 | 3,745 | 17,523 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 17,523 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 3,745 | 17,523 | | |
U.S. | International fixed income funds | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | International fixed income funds | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 3,745 | 17,523 | 3,745 | 17,523 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 17,523 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 3,745 | 17,523 | | |
U.S. | International fixed income funds | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | Alternative strategy funds | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 23,646 | 25,403 | 23,646 | 25,403 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 25,403 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 23,646 | 25,403 | | |
U.S. | Alternative strategy funds | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.S. | Alternative strategy funds | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 8,880 | 8,915 | 8,880 | 8,915 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 8,915 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 8,880 | 8,915 | | |
U.S. | Alternative strategy funds | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 14,766 | 16,488 | 14,766 | 16,488 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 16,488 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 14,766 | 16,488 | | |
U.S. | Real estate funds | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 14,766 | 16,488 | 14,766 | 16,488 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 16,488 | 15,134 | | |
Actual return on plan assets: | | | | |
Related to assets still held at the reporting date | (1,722) | 1,354 | | |
End of measurement period | 14,766 | 16,488 | | |
U.K Plan | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 296,943 | 267,508 | 296,943 | 267,508 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 267,508 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 296,943 | 267,508 | | |
U.K Plan | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 2,338 | 3,156 | 2,338 | 3,156 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 3,156 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 2,338 | 3,156 | | |
U.K Plan | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 284,870 | 254,407 | 284,870 | 254,407 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 254,407 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 284,870 | 254,407 | | |
U.K Plan | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 9,735 | 9,945 | 9,735 | 9,945 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 9,945 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 9,735 | 9,945 | | |
U.K Plan | Cash and cash equivalents | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 2,338 | 3,156 | 2,338 | 3,156 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 3,156 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 2,338 | 3,156 | | |
U.K Plan | Cash and cash equivalents | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 2,338 | 3,156 | 2,338 | 3,156 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 3,156 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 2,338 | 3,156 | | |
U.K Plan | Cash and cash equivalents | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | Cash and cash equivalents | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | U.S. equity securities | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 43,613 | 38,307 | 43,613 | 38,307 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 38,307 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 43,613 | 38,307 | | |
U.K Plan | U.S. equity securities | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | U.S. equity securities | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 43,613 | 38,307 | 43,613 | 38,307 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 38,307 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 43,613 | 38,307 | | |
U.K Plan | U.S. equity securities | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | International equity securities | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 9,418 | 9,916 | 9,418 | 9,916 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 9,916 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 9,418 | 9,916 | | |
U.K Plan | International equity securities | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | International equity securities | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 9,418 | 9,916 | 9,418 | 9,916 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 9,916 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 9,418 | 9,916 | | |
U.K Plan | International equity securities | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | Short-term Investment funds | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 167,741 | 160,609 | 167,741 | 160,609 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 160,609 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 167,741 | 160,609 | | |
U.K Plan | Short-term Investment funds | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | Short-term Investment funds | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 167,741 | 160,609 | 167,741 | 160,609 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 160,609 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 167,741 | 160,609 | | |
U.K Plan | Short-term Investment funds | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | Government securities | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 34,926 | 31,531 | 34,926 | 31,531 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 31,531 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 34,926 | 31,531 | | |
U.K Plan | Government securities | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | Government securities | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 34,926 | 31,531 | 34,926 | 31,531 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 31,531 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 34,926 | 31,531 | | |
U.K Plan | Government securities | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | Alternative strategy funds | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 29,172 | 14,044 | 29,172 | 14,044 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 14,044 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 29,172 | 14,044 | | |
U.K Plan | Alternative strategy funds | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | Alternative strategy funds | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 29,172 | 14,044 | 29,172 | 14,044 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 14,044 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 29,172 | 14,044 | | |
U.K Plan | Alternative strategy funds | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | Real estate funds | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 9,735 | 9,945 | 9,735 | 9,945 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 9,945 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 9,735 | 9,945 | | |
U.K Plan | Real estate funds | Quoted Prices in Active Markets (Level 1) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | Real estate funds | Significant Other Observable Inputs (Level 2) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 0 | 0 | 0 | 0 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 0 | | | |
Actual return on plan assets: | | | | |
End of measurement period | 0 | 0 | | |
U.K Plan | Real estate funds | Significant Unobservable Inputs (Level 3) | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Fair value of plan assets | 9,735 | 9,945 | $ 9,735 | $ 9,945 |
Change in fair value of plan assets [Roll Forward] | | | | |
Beginning of measurement period | 9,945 | 9,689 | | |
Actual return on plan assets: | | | | |
Related to assets still held at the reporting date | (210) | 256 | | |
End of measurement period | $ 9,735 | $ 9,945 | | |