Bank Credit Agreements and Other Short-Term and Long-Term Debt - Additional Information (Details) (USD $)	0 Months Ended	12 Months Ended
	Jan. 08, 2013	Dec. 31, 2014	Dec. 31, 2013
Line Of Credit Facility [Line Items]
Lines of credit unused and available		$ 89,000,000
Line of Credit Facility Credit Used For Guarantee		3,000,000
Maximum
Line Of Credit Facility [Line Items]
Line of credit facility additional increase in borrowing capacity	200,000,000
Revolver
Line Of Credit Facility [Line Items]
Lines of credit maximum borrowing capacity	300,000,000
Debt Instrument, Issuance Date		Jan. 08, 2013
Line of Credit Facility, Affiliated Borrower		Diodes International B.V
Line of credit, credit term		5 years
Line of Credit Facility, Expiration Date		Jan. 08, 2018
Term Loan, Interest Rate Terms		Borrowed amounts bear interest at a rate per annum equal to the sum of (a) the highest of (i) the Federal Funds Rate plus 1⁄2 of 1.00%, (ii) the rate of interest in effect for such day as publicly announced from time to time by Bank of America as its “prime rate,” and (iii) the Eurocurrency Rate plus 1.00%, plus (b) an amount between 0.50% per annum and 1.25% per annum, based upon the Borrowers’ and their subsidiaries’ Consolidated Leverage Ratio. Eurocurrency loans bear interest at LIBOR plus an amount between 1.50% and 2.25% per annum, based upon the Borrowers’ and their subsidiaries’ Consolidated Leverage Ratio.
Line of Credit Facility, Covenant Terms		The Credit Agreement contains certain financial and non-financial covenants, including, but not limited to, a maximum Consolidated Leverage Ratio, a minimum Consolidated Fixed Charge Coverage Ratio, and restrictions on liens, indebtedness, investments, fundamental changes, dispositions, and restrictive payments (including dividends). As of December 31, 2014, we were in compliance with the bank covenants.
Long-term Debt, Gross		139,000,000	179,000,000
Swing Line Sublimit
Line Of Credit Facility [Line Items]
Lines of credit maximum borrowing capacity	10,000,000
Letter Of Credit Sublimit
Line Of Credit Facility [Line Items]
Lines of credit maximum borrowing capacity	10,000,000
Alternative Currency Sublimit
Line Of Credit Facility [Line Items]
Lines of credit maximum borrowing capacity	20,000,000
Unsecured
Line Of Credit Facility [Line Items]
Lines of credit maximum borrowing capacity		$ 92,440,000