Debt (Long Term Debt) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 1,646,350,000	$ 1,545,000,000
Debt Instrument, Unamortized Premium	6,390,000	0
Less: Short-term borrowings and current portion of long-term debt	(61,350,000)	0
Long-term debt (including related party)	1,591,390,000	1,545,000,000
Revolving Credit Facility Due April 2015 [Member] \| Taiwan Subsidiaries [Member]
Debt Instrument [Line Items]
Borrowing under senior secured credit facility	0	0
Senior Notes Due May 2018 [Member]
Debt Instrument [Line Items]
Senior notes	345,000,000	345,000,000
Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Senior notes	400,000,000	400,000,000
Senior Notes Due October 2022 [Member]
Debt Instrument [Line Items]
Senior notes	525,000,000	300,000,000
Convertible Senior Subordinated Notes Due April 2014 [Member]
Debt Instrument [Line Items]
Convertible subordinated notes	56,350,000	250,000,000
Term Loan Due March 2015 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Term Loan for subsidiaries	80,000,000	100,000,000
Term Loan Due June 2016 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Term Loan for subsidiaries	70,000,000	0
Term Loan Due July 2017 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Term Loan for subsidiaries	90,000,000	137,000,000
Term Loan Due September 2017 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Term Loan for subsidiaries	10,000,000	0
Term Loan Due December 2019 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Term Loan for subsidiaries	70,000,000	13,000,000
Revolving credit facility 2.00% due June 2016 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Borrowing under senior secured credit facility	0	0
$150 Million Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Borrowing under senior secured credit facility	$ 0	$ 0

Non current long-term debt including related party.

No definition available.

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- Definition

Including the current and noncurrent portions, the carrying value of convertible subordinated debt, as of the balance sheet date, initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. This form of debt can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder, and places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Article 5

-Subsection 20, 22

+ Details

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- Definition

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19,20)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Article 5

+ Details

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- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-Name Accounting Standards Codification

-Topic 210

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

+ Details

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- Details

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- Definition

The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

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- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

+ Details

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

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