Business Acquisitions - Summary of Fair Value of Assets and Liabilities Related to Acquisition Recorded in Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Nov. 30, 2020	Mar. 04, 2020	Dec. 31, 2019	Apr. 01, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 158,331			$ 141,318		$ 132,437
Lite On Semiconductor
Business Acquisition [Line Items]
Cash and cash equivalents		$ 131,046
Accounts receivable		44,896
Property, plant and equipment		67,952
Inventories		55,710
Prepaid expenses and other current assets		11,447
Deferred income tax		15,732
Other long-term assets		26,037
Total assets acquired		352,820
Line of credit		88,508
Accounts payable		35,245
Accrued liabilities and other		48,992
Income tax payable		6,264
Deferred tax liabilities		8,941
Other long-term liabilities		10,783
Total liabilities assumed		198,733
Non-controlling interest		54
Net assets acquired		$ 154,033
Savitech Acquisition
Business Acquisition [Line Items]
Cash and cash equivalents			$ 6,200
Prepaid expenses and other current assets			700
Goodwill			13,900
Intangible assets, net			6,100
Other long-term assets			400
Accrued liabilities and other			9,900
Non-controlling interest			$ 11,800
Wafer Fabrication Facility ("GFAB")
Business Acquisition [Line Items]
Property, plant and equipment					$ 24,400
Inventories					3,600
Prepaid expenses and other current assets					5,200
Goodwill					900
Deferred tax liabilities					$ 1,000