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Fair Value Hierarchy (Details) - USD ($)
$ in Thousands
Apr. 01, 2016
Dec. 31, 2015
Cash equivalents $ 20,455 $ 22,516
Deferred compensation plans 4,216 4,000
Deferred compensation plans liability 4,216 4,000
Assets, Fair Value Disclosure 30,774 30,060
Liabilities, Fair Value Disclosure 12,304 11,787
Fair Value, Inputs, Level 1 [Member]    
Cash equivalents 20,455 22,516
Assets, Fair Value Disclosure 20,455 22,516
Fair Value, Inputs, Level 2 [Member]    
Deferred compensation plans 4,216 4,000
Deferred compensation plans liability 4,216 4,000
Assets, Fair Value Disclosure 10,319 7,544
Liabilities, Fair Value Disclosure 12,304 11,787
Foreign currency contracts related to customer sales contracts    
Foreign currency contracts designated as hedges, Assets 2,228 988
Foreign currency contracts not designated as hedges, Assets 1,922 664
Foreign currency contracts designated as hedges, Liabilities 5,950 6,368
Foreign currency contracts not designated as hedges, Liability 199 969
Foreign currency contracts related to customer sales contracts | Fair Value, Inputs, Level 2 [Member]    
Foreign currency contracts designated as hedges, Assets 2,228 988
Foreign currency contracts not designated as hedges, Assets 1,922 664
Foreign currency contracts designated as hedges, Liabilities 5,950 6,368
Foreign currency contracts not designated as hedges, Liability 199 969
Foreign currency contracts related to supplier purchase contracts    
Foreign currency contracts designated as hedges, Assets 1,889 1,554
Foreign currency contracts not designated as hedges, Assets 64 338
Foreign currency contracts designated as hedges, Liabilities 1,049 322
Foreign currency contracts not designated as hedges, Liability 890 128
Foreign currency contracts related to supplier purchase contracts | Fair Value, Inputs, Level 2 [Member]    
Foreign currency contracts designated as hedges, Assets 1,889 1,554
Foreign currency contracts not designated as hedges, Assets 64 338
Foreign currency contracts designated as hedges, Liabilities 1,049 322
Foreign currency contracts not designated as hedges, Liability $ 890 $ 128