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Related Parties - Additional Information (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Lite On Semiconductor      
Related Party Transaction [Line Items]      
Related Party ownership of common stock     17.00%diod_RelatedPartyPercentageOwnershipOfCommonStock
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_LiteOnSemiconductorMember
Related Party Transaction, Description of Transaction LSC is our largest stockholder, owning approximately 17% of our outstanding Common Stock as of March 31, 2015, and is a member of the Lite-On Group of companies.    
Keylink      
Related Party Transaction [Line Items]      
Related Party ownership of common stock 5.00%diod_RelatedPartyPercentageOwnershipOfCommonStock
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_KeylinkMember		    
Related Party Transaction, Description of Transaction Keylink is our 5% joint venture partner in our Shanghai assembly and test facilities.    
Related Party Transaction Consulting Fees From Transactions With Related Party 4us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_KeylinkMember		 $ 4us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_KeylinkMember		  
Chengdu Ya Guang Electronic Company Limited (“Ya Guang”)      
Related Party Transaction [Line Items]      
Related Party ownership of common stock 5.00%diod_RelatedPartyPercentageOwnershipOfCommonStock
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_YaGuangMember		    
Related Party Transaction, Description of Transaction In addition, Chengdu Ya Guang Electronic Company Limited (“Ya Guang”) is our 5% joint venture partner in our two Chengdu assembly and test facilities