v3.10.0.1
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2018
Aug. 03, 2018
Document And Entity Information [Abstract]    
Document type 10-Q  
Document period end date Jun. 30, 2018  
Amendment flag false  
Entity registrant name DIODES INC /DEL/  
Entity central index key 0000029002  
Current fiscal year end date --12-31  
Entity filer category Large Accelerated Filer  
Entity common stock shares outstanding   50,088,309
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Trading Symbol DIOD