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Retirement Plans And Postretirement Benefits (Fair Asset Values Of Plan Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 115,199 $ 123,463  
Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,978 2,094  
Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 958 831  
Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,396 12,787  
Fair Value Measured at Net Asset Value Per Share [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 97,867 107,751  
U.S. [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 99,845 109,845 $ 100,905
U.S. [Member] | Cash And Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,978 2,094  
U.S. [Member] | Level 1 [Member] | Cash And Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,978 2,094  
U.S. [Member] | Level 2 [Member] | Cash And Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
U.S. [Member] | Level 3 [Member] | Cash And Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Foreign [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 15,354 13,618 $ 11,871
Foreign [Member] | Foreign Government Bonds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 958 831  
Foreign [Member] | Fixed Insurance Contracts [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,396 12,787  
Foreign [Member] | Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Foreign [Member] | Level 1 [Member] | Foreign Government Bonds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Foreign [Member] | Level 1 [Member] | Fixed Insurance Contracts [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Foreign [Member] | Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 958 831  
Foreign [Member] | Level 2 [Member] | Foreign Government Bonds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 958 831  
Foreign [Member] | Level 2 [Member] | Fixed Insurance Contracts [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Foreign [Member] | Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,396 12,787  
Foreign [Member] | Level 3 [Member] | Foreign Government Bonds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0 0  
Foreign [Member] | Level 3 [Member] | Fixed Insurance Contracts [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 14,396 12,787  
Foreign [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 15,354 $ 13,618