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Goodwill and Purchased and Other Intangibles (Tables) | 9 Months Ended
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Aug. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Purchased and other intangible assets | Purchased and other intangible assets subject to amortization as of August 31, 2018 and December 1, 2017 were as follows (in thousands):
| 2018 |  | 2017
| Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Purchased technology | $ | 307,101 |  |  | $ | (100,832 | ) |  | $ | 206,269 |  |  | $ | 223,252 |  |  | $ | (110,433 | ) |  | $ | 112,819 |
Customer contracts and relationships | $ | 753,870 |  |  | $ | (387,091 | ) |  | $ | 366,779 |  |  | $ | 577,484 |  |  | $ | (356,613 | ) |  | $ | 220,871 |
Trademarks | 56,355 |  |  | (20,016 | ) |  | 36,339 |  |  | 76,255 |  |  | (56,094 | ) |  | 20,161 |
Acquired rights to use technology | 58,966 |  |  | (47,097 | ) |  | 11,869 |  |  | 71,130 |  |  | (54,223 | ) |  | 16,907 |
Other intangibles | 81,357 |  |  | (33,137 | ) |  | 48,220 |  |  | 39,296 |  |  | (24,396 | ) |  | 14,900 |
Total other intangible assets | $ | 950,548 |  |  | $ | (487,341 | ) |  | $ | 463,207 |  |  | $ | 764,165 |  |  | $ | (491,326 | ) |  | $ | 272,839 |
Purchased and other intangible assets, net | $ | 1,257,649 |  |  | $ | (588,173 | ) |  | $ | 669,476 |  |  | $ | 987,417 |  |  | $ | (601,759 | ) |  | $ | 385,658 |
Amortization expense in future periods | As of August 31, 2018, we expect amortization expense in future periods to be as follows (in thousands):
Fiscal Year |  | Purchased Technology |  | Other Intangible Assets
Remainder of 2018 | $ | 13,596 |  |  | $ | 36,274 |
2019 | 51,112 |  |  | 118,652 |
2020 | 48,820 |  |  | 86,498 |
2021 | 26,369 |  |  | 54,119 |
2022 | 18,610 |  |  | 39,749 |
Thereafter | 47,762 |  |  | 127,915 |
Total expected amortization expense | $ | 206,269 |  |  | $ | 463,207 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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