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Related Party Transactions - Additional Information (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
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 December 31, 2014, and is a member of the Lite-On Group of companies.    
Related Party Transaction Revenues Percentage from Transactions with Related Party 1.00%diod_RelatedPartyTransactionRevenuesPercentageFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_LiteOnSemiconductorMember		 1.00%diod_RelatedPartyTransactionRevenuesPercentageFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_LiteOnSemiconductorMember		 1.00%diod_RelatedPartyTransactionRevenuesPercentageFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_LiteOnSemiconductorMember
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 Revenues Percentage from Transactions with Related Party 1.00%diod_RelatedPartyTransactionRevenuesPercentageFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_KeylinkMember		 1.00%diod_RelatedPartyTransactionRevenuesPercentageFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_KeylinkMember		 3.00%diod_RelatedPartyTransactionRevenuesPercentageFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_KeylinkMember
Related Party Transaction Consulting Fees from Transactions with Related Party 19us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_KeylinkMember		 17us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= diod_KeylinkMember		 19us-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