Pension and Other Postretirement Benefits - Asset Categories Based on the Nature and Risks of the Plan Assets (Detail) £ in Thousands, $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2022 GBP (£)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 GBP (£)	Dec. 31, 2020 USD ($)
Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	$ 41,679	£ 34,475	$ 71,614	£ 53,008
Fixed Income Securities Corporate Bonds | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	38,330		41,798
Fixed-Income Securities, Commingled Funds (U.K.) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	24,144		16,320
Fixed-Income Securities, Commingled Funds (International) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			25,478
Other (Primarily Cash and Cash Equivalents) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	3,349		8,445
Equity Securities [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			10,947
Equity Securities, Commingled Funds (U.K.) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			1,079
Equity Securities, Commingled Funds (International) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	14,186		9,868
Alternative Investments, Absolute Return Funds [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			1,347
Multi Asset Commingled Funds (International) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			9,077
Defined Benefit Plan Assets [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	41,679		71,614
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Other (Primarily Cash and Cash Equivalents) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	647
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Defined Benefit Plan Assets [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	647
Significant Other Observable Inputs (Level 2) [Member] | Fixed Income Securities Corporate Bonds | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	37,499		31,601
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Income Securities, Commingled Funds (U.K.) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	24,144		16,320
Significant Other Observable Inputs (Level 2) [Member] | Fixed-Income Securities, Commingled Funds (International) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			15,281
Significant Other Observable Inputs (Level 2) [Member] | Other (Primarily Cash and Cash Equivalents) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	2,702		8,445
Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			1,663
Significant Other Observable Inputs (Level 2) [Member] | Equity Securities, Commingled Funds (International) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	13,355		1,663
Significant Other Observable Inputs (Level 2) [Member] | Multi Asset Commingled Funds (International) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			9,077
Significant Other Observable Inputs (Level 2) [Member] | Defined Benefit Plan Assets [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	40,201		50,786
Significant Unobservable Inputs (Level 3) [Member] | Fixed Income Securities Corporate Bonds | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	831		10,197
Significant Unobservable Inputs (Level 3) [Member] | Fixed-Income Securities, Commingled Funds (International) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			10,197
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			9,284
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities, Commingled Funds (U.K.) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			1,079
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities, Commingled Funds (International) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	831		8,205
Significant Unobservable Inputs (Level 3) [Member] | Alternative Investments, Absolute Return Funds [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			1,347
Significant Unobservable Inputs (Level 3) [Member] | Defined Benefit Plan Assets [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	831		20,828
Defined Benefit Pension Plan [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	161,374		214,937		$ 210,880
Defined Benefit Pension Plan [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	41,679		71,614		66,957
Defined Benefit Pension Plan [Member] | Equity Securities [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	72,997		115,308
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Consumer Discretionary [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	2,697		6,442
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Consumer Staples [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	2,454		3,050
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Energy [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	1,112		1,167
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Financial [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	3,165		4,617
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Healthcare [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	5,967		10,526
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Industrials [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	4,222		8,089
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Information Technology [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	438		11,819
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Materials [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	369		938
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Mutual Funds and ETFs [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	43,408		58,440
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Real Estate [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	279		824
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Telecommunications [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	1,183		2,388
Defined Benefit Pension Plan [Member] | Equity Securities, U.S., Utilities [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	324		146
Defined Benefit Pension Plan [Member] | Equity Securities, International, Consumer Discretionary [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	66		426
Defined Benefit Pension Plan [Member] | Equity Securities, International, Financial [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	450		751
Defined Benefit Pension Plan [Member] | Equity Securities, International, Healthcare [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	123		880
Defined Benefit Pension Plan [Member] | Equity Securities, International, Industrials [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	463		1,410
Defined Benefit Pension Plan [Member] | Equity Securities, International, Information Technology [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	5,631		2,065
Defined Benefit Pension Plan [Member] | Equity Securities, International, Materials [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	646		1,330
Defined Benefit Pension Plan [Member] | Fixed Income Securities [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	77,670		81,987
Defined Benefit Pension Plan [Member] | Fixed Income Securities, Corporate Bonds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	5,983
Defined Benefit Pension Plan [Member] | Fixed Income Securities, Treasury Bonds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	26,247		28,694
Defined Benefit Pension Plan [Member] | Fixed Income Securities, Agency Bonds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	231		257
Defined Benefit Pension Plan [Member] | Fixed Income Securities, Mutual Funds and ETFs [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	6,162		7,334
Defined Benefit Pension Plan [Member] | Fixed Income Securities, Corporate Bonds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	39,047		3,711
Defined Benefit Pension Plan [Member] | Fixed Income Securities Corporate Bonds | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			41,991
Defined Benefit Pension Plan [Member] | Alternative Investments [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	6,569		8,167
Defined Benefit Pension Plan [Member] | Alternative Investments, Managed Funds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	6,569		8,167
Defined Benefit Pension Plan [Member] | Other [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	4,138		9,475
Defined Benefit Pension Plan [Member] | Other (Primarily Cash and Cash Equivalents) [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	4,138		9,349
Defined Benefit Pension Plan [Member] | Other, Other [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			126
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	109,544		160,761
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	72,997		115,308
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Consumer Discretionary [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	2,697		6,442
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Consumer Staples [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	2,454		3,050
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Energy [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	1,112		1,167
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Financial [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	3,165		4,617
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Healthcare [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	5,967		10,526
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Industrials [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	4,222		8,089
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Information Technology [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	438		11,819
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Materials [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	369		938
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Mutual Funds and ETFs [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	43,408		58,440
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Real Estate [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	279		824
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Telecommunications [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	1,183		2,388
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, U.S., Utilities [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	324		146
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, International, Consumer Discretionary [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	66		426
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, International, Financial [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	450		751
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, International, Healthcare [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	123		880
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, International, Industrials [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	463		1,410
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, International, Information Technology [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	5,631		2,065
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Equity Securities, International, Materials [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	646		1,330
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Fixed Income Securities [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	32,409		36,028
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Fixed Income Securities, Treasury Bonds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	26,247		28,694
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Fixed Income Securities, Mutual Funds and ETFs [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	6,162		7,334
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Alternative Investments [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	0
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Alternative Investments, Managed Funds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	0
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Other [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	4,138		9,425
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Other (Primarily Cash and Cash Equivalents) [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	4,138		9,349
Defined Benefit Pension Plan [Member] | Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Other, Other [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			76
Defined Benefit Pension Plan [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	45,261		45,959
Defined Benefit Pension Plan [Member] | Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	0
Defined Benefit Pension Plan [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fixed Income Securities [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	45,261		45,959
Defined Benefit Pension Plan [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fixed Income Securities, Corporate Bonds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	5,983
Defined Benefit Pension Plan [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fixed Income Securities, Agency Bonds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	231		257
Defined Benefit Pension Plan [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fixed Income Securities, Corporate Bonds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	39,047		3,711
Defined Benefit Pension Plan [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fixed Income Securities Corporate Bonds | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			41,991
Defined Benefit Pension Plan [Member] | Significant Other Observable Inputs (Level 2) [Member] | Alternative Investments [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	0
Defined Benefit Pension Plan [Member] | Significant Other Observable Inputs (Level 2) [Member] | Alternative Investments, Managed Funds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	0
Defined Benefit Pension Plan [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	0
Defined Benefit Pension Plan [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other (Primarily Cash and Cash Equivalents) [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	0
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	6,569		8,217
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | Foreign Defined Benefits Pension Plans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	831		20,828		23,765
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	0
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed Income Securities [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	0
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | Alternative Investments [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	6,569		8,167		$ 7,557
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | Alternative Investments, Managed Funds [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	6,569		8,167
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	0		50
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other (Primarily Cash and Cash Equivalents) [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets	$ 0
Defined Benefit Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other, Other [Member] | U.S. [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of plan assets			$ 50