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Fair Value of Financial Instruments (Detail) - Fair Value, Measurements, Recurring - USD ($)
$ in Thousands
Sep. 28, 2018
Dec. 31, 2017
Financial Assets    
Assets Fair Value Disclosure $ 3,281 $ 2,578
Financial Liabilities    
Liabilities Fair Value Disclosure 2,667 2,780
Deferred Compensation Investments Liabilities    
Financial Liabilities    
Liabilities Fair Value Disclosure 2,400 2,310
Foreign Currency Forward Contract    
Financial Liabilities    
Liabilities Fair Value Disclosure 170 201
Precious Metal Swaps    
Financial Liabilities    
Liabilities Fair Value Disclosure 97 269
Fair Value, Inputs, Level 1    
Financial Assets    
Assets Fair Value Disclosure 2,400 2,310
Financial Liabilities    
Liabilities Fair Value Disclosure 2,400 2,310
Fair Value, Inputs, Level 1 | Deferred Compensation Investments Liabilities    
Financial Liabilities    
Liabilities Fair Value Disclosure 2,400 2,310
Fair Value, Inputs, Level 1 | Foreign Currency Forward Contract    
Financial Liabilities    
Liabilities Fair Value Disclosure 0 0
Fair Value, Inputs, Level 1 | Precious Metal Swaps    
Financial Liabilities    
Liabilities Fair Value Disclosure 0 0
Fair Value, Inputs, Level 2    
Financial Assets    
Assets Fair Value Disclosure 881 268
Financial Liabilities    
Liabilities Fair Value Disclosure 267 470
Fair Value, Inputs, Level 2 | Deferred Compensation Investments Liabilities    
Financial Liabilities    
Liabilities Fair Value Disclosure 0 0
Fair Value, Inputs, Level 2 | Foreign Currency Forward Contract    
Financial Liabilities    
Liabilities Fair Value Disclosure 170 201
Fair Value, Inputs, Level 2 | Precious Metal Swaps    
Financial Liabilities    
Liabilities Fair Value Disclosure 97 269
Fair Value, Inputs, Level 3    
Financial Assets    
Assets Fair Value Disclosure 0 0
Financial Liabilities    
Liabilities Fair Value Disclosure 0 0
Fair Value, Inputs, Level 3 | Deferred Compensation Investments Liabilities    
Financial Liabilities    
Liabilities Fair Value Disclosure 0 0
Fair Value, Inputs, Level 3 | Foreign Currency Forward Contract    
Financial Liabilities    
Liabilities Fair Value Disclosure 0 0
Fair Value, Inputs, Level 3 | Precious Metal Swaps    
Financial Liabilities    
Liabilities Fair Value Disclosure 0 0
Deferred Compensation Investments Assets    
Financial Assets    
Assets Fair Value Disclosure 2,400 2,310
Deferred Compensation Investments Assets | Fair Value, Inputs, Level 1    
Financial Assets    
Assets Fair Value Disclosure 2,400 2,310
Deferred Compensation Investments Assets | Fair Value, Inputs, Level 2    
Financial Assets    
Assets Fair Value Disclosure 0 0
Deferred Compensation Investments Assets | Fair Value, Inputs, Level 3    
Financial Assets    
Assets Fair Value Disclosure 0 0
Foreign Currency Forward Contract    
Financial Assets    
Assets Fair Value Disclosure 226 254
Foreign Currency Forward Contract | Fair Value, Inputs, Level 1    
Financial Assets    
Assets Fair Value Disclosure 0 0
Foreign Currency Forward Contract | Fair Value, Inputs, Level 2    
Financial Assets    
Assets Fair Value Disclosure 226 254
Foreign Currency Forward Contract | Fair Value, Inputs, Level 3    
Financial Assets    
Assets Fair Value Disclosure 0 0
Precious Metal Swaps    
Financial Assets    
Assets Fair Value Disclosure 655 14
Precious Metal Swaps | Fair Value, Inputs, Level 1    
Financial Assets    
Assets Fair Value Disclosure 0 0
Precious Metal Swaps | Fair Value, Inputs, Level 2    
Financial Assets    
Assets Fair Value Disclosure 655 14
Precious Metal Swaps | Fair Value, Inputs, Level 3    
Financial Assets    
Assets Fair Value Disclosure $ 0 $ 0