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Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Apr. 01, 2016
Noncash investing and financing activities: |  |
Property, plant and equipment purchases included in accounts payable | $ 3,243 | $ 4,304
Purchase of technology included in accrued expenses | 0 | 2,000
Divestiture of noncash assets | 0 | 54,591
Divestiture of liabilities | $ 0 | $ 2,119

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