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Share-Based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Cost of revenues	$ 666,501	$ 533,916	$ 554,690
Research and development	122,265	114,859	123,037
General and administrative	23,915	23,672	21,823
Sales and marketing	16,675	17,628	20,380
Total compensation recognized in income	8	5	22
Income tax benefit	11,712	416	994
Share Based Compensation [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Cost of revenues	87	9	90
Research and development	4,467	339	3,165
General and administrative	368	50	387
Sales and marketing	603	59	544
Total compensation recognized in income	5,525	457	4,186
Income tax benefit	$ 1,176	$ 89	$ 894

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The amount of costs relating to expenses directly or indirectly attributed to the goods or services sold, which may include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, unallocated production overheads and abnormal amounts of production costs of inventories.

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