Derivative Instruments - Forward Contract Hedges in the Consolidated Condensed Balance Sheets (Details) - Cash Flow Hedging - Designated as hedging instrument - Foreign Exchange Forward $ in Thousands |
Sep. 28, 2018
USD ($)
|
|---|---|
| Other accrued liabilities | |
| Derivative [Line Items] | |
| Foreign currency forward designated as cash flow hedge, liability | $ 183 |
| Other non-current liabilities | |
| Derivative [Line Items] | |
| Foreign currency forward designated as cash flow hedge, liability | $ 13 |