Business Combination - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Nov. 24, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Additional interest expense included in unaudited proforma consolidated results		$ 13,448	$ 13,257	$ 4,232
Additional income tax expense benefit included in unaudited proforma consolidated results		$ 62,325	$ 6,558	14,082
Pericom
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Nov. 24, 2015
Business Acquisition, Cost of Acquired Entity, Description of Purchase Price Components		we completed our acquisition of Pericom Semiconductor Corporation (“Pericom”) pursuant to the Agreement and Plan of Merger dated as of September 2, 2015 (the “Merger Agreement”), as amended on November 6, 2015, by Amendment No. 1 (the “Merger Agreement Amendment”). Under the Merger Agreement and the Merger Agreement Amendment and in accordance with the General Corporation Law of the State of California (1) PSI Merger Sub, Inc., a California corporation and wholly-owned subsidiary of the Company, was merged with and into Pericom, with Pericom continuing as the surviving corporation and a wholly-owned subsidiary of the Company, and (2) each outstanding share of common stock, without par value, of Pericom (other than shares owned by Pericom or certain of its affiliates or shares held by Pericom shareholders who have perfected their appraisal rights in accordance with applicable California law) was automatically converted into the right to receive $17.75 in cash per share, without interest. The aggregate consideration was approximately $403.2 million including the value of Pericom equity awards paid out or converted to Diodes equity awards pursuant to the Merger Agreement and Merger Agreement Amendment
Exchange rights value of shares	$ 17.75
Business acquisition aggregate consideration	$ 403,174
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual				14,600
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual				(1,000)
Business Acquisition, Pro Forma Information, Description		The table below sets for the unaudited pro forma consolidated results of operations for the years ended December 31, 2015 and December 31, 2014 as if the acquisition of Pericom had occurred at January 1, 2014. The unaudited pro forma consolidated results of operations do not purport to be indicative of the results that would have been obtained if the above acquisition had actually occurred as of the dates indicated or of those results that may be obtained in the future. These unaudited pro forma consolidated results of operations were derived, in part, from the historical consolidated financial statements of Pericom and other available information and assumptions believed to be reasonable under the circumstances.
Acquisition related costs excluded in unaudited proforma consolidated results				10,000
Cost of restricted stock grants and change in control agreements excluded in unaudited proforma consolidated results				8,000
Additional amortization included in unaudited proforma consolidated results				12,000
Additional interest expense included in unaudited proforma consolidated results				11,000
Additional income tax expense benefit included in unaudited proforma consolidated results				$ 1,000