Debt Long Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 1,646,350	$ 1,646,350
Add: Unamortized premium	6,252	6,390
Less: Short-term borrowings and current portion of long-term debt	(66,350)	(61,350)
Long-term debt (including related party)	1,586,252	1,591,390
Senior Notes Due May 2018 [Member]
Debt Instrument [Line Items]
Senior notes	345,000	345,000
Senior Notes Due June 2021 [Member]
Debt Instrument [Line Items]
Senior notes	400,000	400,000
Senior Notes Due October 2022 [Member]
Debt Instrument [Line Items]
Senior notes	525,000	525,000
Convertible Senior Subordinated Notes Due April 2014 [Member]
Debt Instrument [Line Items]
Convertible senior subordinated notes	56,350	56,350
Term Loan Due June 2016 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Subsidiary term loan	70,000	70,000
Term Loan Due March 2017 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Subsidiary term loan	80,000	0
Term Loan Due July 2017 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Subsidiary term loan	90,000	90,000
Term Loan Due September 2017 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Subsidiary term loan	10,000	10,000
Term Loan Due December 2019 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Subsidiary term loan	70,000	70,000
Term Loan Due March 2015 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Subsidiary term loan	0	80,000
Senior Secured Revolving Credit Facility due June 2017
Debt Instrument [Line Items]
Borrowing under credit facility	0	0
Revolving Credit Facility Due June 2016 [Member] \| Korea Subsidiaries [Member]
Debt Instrument [Line Items]
Borrowing under credit facility	0	0
Revolving Credit Facility Due April 2015 [Member] \| Taiwan Subsidiaries [Member]
Debt Instrument [Line Items]
Borrowing under 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

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-Section 02

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-Subsection 20, 22

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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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- 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

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-Publisher SEC

-Name Regulation S-X (SX)

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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

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- Definition

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

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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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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