Bank Credit Agreements and Other Short-Term and Long-Term Debt (Convertible senior notes) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended
Oct. 31, 2006
Convertible Senior Notes [Abstract]
Debt Instrument Convertible Initial Principal Amount	$ 230
Debt Instrument Covertible, Maturity Date	2026

Date when the debt instrument is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.).

No definition available.

Name:	diod_DebtInstrumentConvertibleMaturityDate
Namespace Prefix:	diod_
Data Type:	invest:dateStringItemType
Balance Type:	na
Period Type:	duration