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Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Currently payable [Abstract]          
Federal [1]     $ 15,513 $ 12,145 $ 20,794
State     642 2,631 2,936
Foreign     25,254 19,168 23,873
Current income tax (expense), total     41,409 33,944 47,603
Deferred (benefit) expense [Abstract]          
Federal     18,458 7,630 5,779
State     215 1,656 (772)
Foreign     (1,259) 1,142 (10,461)
Deferred income tax (expense), total     17,414 10,428 (5,454)
Income taxes     58,823 44,372 $ 42,149
Deferred tax assets [Abstract]          
Benefit plans $ 8,440   8,440 11,040  
Liabilities and reserves 11,141   11,141 15,733  
Operating loss and credit carryovers 40,164   40,164 49,778  
Other 1,007   1,007 3,181  
Gross deferred tax assets 60,752   60,752 79,732  
Valuation allowance (38,366)   (38,366) (35,426)  
Deferred tax assets 22,386   22,386 44,306  
Deferred tax liabilities [Abstract]          
Property, plant and equipment (12,458)   (12,458) (1,186)  
Other assets 0   0 (353)  
Goodwill (20,345)   (20,345) (27,863)  
Other (422)   (422) (12,434)  
Deferred tax liabilities (33,225)   (33,225) (41,836)  
Net deferred tax liabilities (10,839)   (10,839)    
Net deferred tax assets       $ 2,470  
Income Tax Disclosure [Line Items]          
Transition tax for accumulated foreign earnings, Income tax expense     7,400    
Transition tax for accumulated foreign earnings, Liability, Noncurrent 5,100   $ 5,100    
Provisional income tax expense 18,400        
Effective tax rate reconciliation [Abstract]          
Taxes at statutory rate     35.00% 35.00% 35.00%
State income taxes, net of federal income tax benefit     0.30% 1.40% 1.70%
Tax credits     (1.10%) (1.80%) (0.70%)
Taxes on foreign earnings     0.20% (4.40%) (0.80%)
Resolution of prior years' tax matters     0.10% 0.00% (0.30%)
U.S. manufacturing deduction     (1.40%) (2.00%) (1.90%)
Valuation allowance adjustments     0.00% (0.30%) (5.00%)
2017 Tax Legislation     12.40% 0.00% 0.00%
Loss on foreign branch remittances     (5.20%) 0.00% 0.00%
Other, net     (0.70%) (1.40%) 0.20%
Effective tax rate     39.60% 26.50% 28.20%
Earnings from continuing operations before income taxes [Abstract]          
United States     $ 88,479 $ 96,963 $ 87,749
Foreign     59,944 70,322 61,647
Total     148,423 167,285 149,396
Reconciliation of change in liability for unrecognized tax benefits [Roll Forward]          
Balance at beginning of year   $ 6,276 4,947 4,963  
Increases for tax positions taken in the current year     871 570  
Increases for tax positions taken in prior years     553 1,204  
Decreases related to settlements with tax authorities     (76) (1,172)  
Decreases as a result of lapse of the applicable statutes of limitations     (607) (426)  
Foreign currency exchange rate changes     588 (192)  
Balance at the end of year 6,276   6,276 4,947 $ 4,963
Unrecognized tax benefits that would impact the effective tax rate, if recognized 4,500   4,500    
Income tax interest and penalties accrued 500   500 $ 400  
Expected decrease in liability for unrecognized tax benefits in the next fiscal year 1,600   1,600    
Unrecognized tax benefits that would impact the effective tax rate in the next fiscal year 800   800    
Plan [Member]          
Effective tax rate reconciliation [Abstract]          
Taxes at statutory rate   21.00%      
Foreign [Member]          
Operating Loss Carryforwards [Line Items]          
Operating loss carryovers 116,800   116,800    
Operating loss carryovers, subject to expiration 25,000   25,000    
Operating loss carryovers, not subject to expiration 91,800   91,800    
State [Member]          
Operating Loss Carryforwards [Line Items]          
Operating loss carryovers $ 138,700   $ 138,700    
[1] This amount includes $7.4 million related to the one-time transition tax on earnings of foreign subsidiaries enacted by the 2017 Tax Legislation (See discussion below). Approximately $5.1 million of this amount is reported in Other liabilities on the Consolidated Balance Sheet at December 31, 2017.