Subsequent Events (Lines of Credit) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Subsequent Event [Line Items]
Subsequent Event, Date	Jan. 08, 2013
Subsequent Event, Description	On January 8, 2013, the Company and Diodes International B.V. (the “Foreign Borrower” and collectively with the Company, the “Borrowers”) and certain subsidiaries of the Company as guarantors, entered into a Credit Agreement (the “New Credit Agreement”) with Bank of America and other participating lenders (collectively, the “Lenders”).
Debt Instrument, Covenant Description	The New 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).
Incurrence Of Debt [Member]
Subsequent Event [Line Items]
Subsequent Event, Description	The New Credit Agreement provides for a five-year, $300 million revolving senior credit facility (the “Revolver”), which includes $10 million swing line sublimit, a $10 million letter of credit sublimit, and $20 million alternative currency sublimit. The Borrowers may from time to time request increases in the aggregate commitment under the New Credit Agreement of up to $200 million, subject to the Lenders electing to increase their commitments or by means of the addition of new Lenders, and subject to at least half of each increase in aggregate commitment being in the form of term loans (“Incremental Term Loans”), with the remaining amount of each being an increase the amount of the Revolver.
Repayment of Debt [Member]
Subsequent Event [Line Items]
Subsequent Event, Description	As part of the New Credit agreement, the Company’s Credit Agreement with Bank of America, as amended, was terminated with no penalties and on January 8, 2013, the Company drew down $45 million on the Revolver to retire the existing Term Loan and pay fees and expenses in connection with entering into the New Credit Agreement.
Revolving Senior Credit Facility [Member]
Subsequent Event [Line Items]
Subsequent Event, Amount	300
Debt Instrument, 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 ½ 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.
Debt Instrument, Maturity Date, Description	The Revolver matures on January 8, 2018
Swing Line Sublimit [Member]
Subsequent Event [Line Items]
Subsequent Event, Amount	10
Letter Of Credit Sublimit [Member]
Subsequent Event [Line Items]
Subsequent Event, Amount	10
Alternative Currency Sublimit [Member]
Subsequent Event [Line Items]
Subsequent Event, Amount	20
Incremental Term Loans [Member]
Subsequent Event [Line Items]
Subsequent Event, Amount	200