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Derivative Financial Instruments (Schedule of Offsetting of Derivative Assets) (Details) - USD ($) $ in Thousands | Sep. 29, 2019 | Dec. 31, 2018
--- | --- | ---
Offsetting of Derivative Assets [Line Items] |  |
Gross Amounts of Recognized Assets | $ 343 | $ 322
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets | 0 | 0
Net Amounts Of Assets Presented in the Unaudited Condensed Consolidated Balance Sheets | 343 | 322
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments | (56) | (68)
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged | 0 | 0
Net Amount | 287 | 254
HSBC |  |
Offsetting of Derivative Assets [Line Items] |  |
Gross Amounts of Recognized Assets | 329 | 100
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets | 0 | 0
Net Amounts Of Assets Presented in the Unaudited Condensed Consolidated Balance Sheets | 329 | 100
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments | (54) | 0
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged | 0 | 0
Net Amount | 275 | 100
Wells Fargo Bank |  |
Offsetting of Derivative Assets [Line Items] |  |
Gross Amounts of Recognized Assets | 14 | 222
Gross Amounts Offset in the Unaudited Condensed Consolidated Balance Sheets | 0 | 0
Net Amounts Of Assets Presented in the Unaudited Condensed Consolidated Balance Sheets | 14 | 222
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Financial Instruments | (2) | (68)
Gross Amounts Not Offset in the Unaudited Condensed Consolidated Balance Sheets: Cash Collateral Pledged | 0 | 0
Net Amount | $ 12 | $ 154

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