Segment Information (Schedule Of Net Revenue By Geographic Region) (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Jul. 01, 2018 |
Apr. 01, 2018 |
Dec. 31, 2017 |
Oct. 01, 2017 |
Jul. 02, 2017 |
Apr. 02, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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Segment Reporting Information [Line Items] | |||||||||||||||
Net revenue | $ 288,928 | $ 269,411 | $ 255,276 | $ 245,201 | $ 274,149 | $ 251,950 | $ 251,685 | $ 261,385 | $ 1,058,816 | $ 1,039,169 | [1] | $ 1,143,445 | [1] | ||
United States (U.S.) | |||||||||||||||
Segment Reporting Information [Line Items] | |||||||||||||||
Net revenue | 686,145 | 648,152 | 713,178 | ||||||||||||
Americas (excluding U.S.) | |||||||||||||||
Segment Reporting Information [Line Items] | |||||||||||||||
Net revenue | 14,548 | 16,937 | 21,802 | ||||||||||||
EMEA | |||||||||||||||
Segment Reporting Information [Line Items] | |||||||||||||||
Net revenue | 207,599 | 197,074 | [1] | 217,554 | [1] | ||||||||||
APAC | |||||||||||||||
Segment Reporting Information [Line Items] | |||||||||||||||
Net revenue | $ 150,524 | $ 177,006 | $ 190,911 | ||||||||||||
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