Nature of Operations, Basis of Presentation and Recently Issued Accounting Pronouncements - Additional Information (Details) $ in Millions	Dec. 31, 2015 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Reduction in other assets and long term notes payable, net of current portion, due to retrospective adoption of ASU 2015-03	$ 2.2

New accounting pronouncement or change in accounting principle effect of change on other assets and long term notes payable.

No definition available.

Name:	diod_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnOtherAssetsAndLongTermNotesPayable
Namespace Prefix:	diod_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant