Fair Value of Financial Instruments (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 29, 2018	Dec. 31, 2017
Financial Assets
Assets Fair Value Disclosure	$ 3,584	$ 2,578
Financial Liabilities
Liabilities Fair Value Disclosure	2,443	2,780
Deferred Compensation Investments Liabilities
Financial Liabilities
Liabilities Fair Value Disclosure	2,420	2,310
Foreign Currency Forward Contract
Financial Liabilities
Liabilities Fair Value Disclosure	23	201
Precious Metal Swaps
Financial Liabilities
Liabilities Fair Value Disclosure	0	269
Fair Value, Inputs, Level 1
Financial Assets
Assets Fair Value Disclosure	2,420	2,310
Financial Liabilities
Liabilities Fair Value Disclosure	2,420	2,310
Fair Value, Inputs, Level 1 | Deferred Compensation Investments Liabilities
Financial Liabilities
Liabilities Fair Value Disclosure	2,420	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	1,164	268
Financial Liabilities
Liabilities Fair Value Disclosure	23	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	23	201
Fair Value, Inputs, Level 2 | Precious Metal Swaps
Financial Liabilities
Liabilities Fair Value Disclosure	0	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	2,420	2,310
Deferred Compensation Investments Assets | Fair Value, Inputs, Level 1
Financial Assets
Assets Fair Value Disclosure	2,420	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	817	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	817	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	347	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	347	14
Precious Metal Swaps | Fair Value, Inputs, Level 3
Financial Assets
Assets Fair Value Disclosure	$ 0	$ 0