Debt (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended	12 Months Ended			1 Months Ended		12 Months Ended		1 Months Ended						12 Months Ended					12 Months Ended			12 Months Ended				12 Months Ended			12 Months Ended			12 Months Ended			1 Months Ended
	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jan. 31, 2012 Korea Subsidiaries [Member]	Mar. 31, 2013 Term Loan Due September 2017 [Member] Korea Subsidiaries [Member]	Dec. 31, 2013 Term Loan Due September 2017 [Member] Korea Subsidiaries [Member]	Dec. 31, 2012 Term Loan Due September 2017 [Member] Korea Subsidiaries [Member]	Jun. 30, 2013 Convertible Senior Subordinated Notes Due April 2014 [Member]	Dec. 31, 2013 Convertible Senior Subordinated Notes Due April 2014 [Member]	Dec. 31, 2012 Convertible Senior Subordinated Notes Due April 2014 [Member]	Apr. 30, 2009 Convertible Senior Subordinated Notes Due April 2014 [Member]	Dec. 31, 2013 Convertible Senior Subordinated Notes Due April 2014 [Member] Related Party [Member]	Apr. 30, 2009 Convertible Senior Subordinated Notes Due April 2014 [Member] Related Party [Member]	Dec. 31, 2013 Term Loan Due June 2016 [Member] Korea Subsidiaries [Member]	Apr. 30, 2013 Term Loan Due June 2016 [Member] Korea Subsidiaries [Member]	Dec. 31, 2012 Term Loan Due June 2016 [Member] Korea Subsidiaries [Member]	Dec. 31, 2013 Senior Notes Due October 2022 [Member]	Dec. 31, 2012 Senior Notes Due October 2022 [Member]	Dec. 31, 2013 Term Loan Due March 2015 [Member] Korea Subsidiaries [Member]	Dec. 31, 2012 Term Loan Due March 2015 [Member] Korea Subsidiaries [Member]	Mar. 31, 2012 Term Loan Due March 2015 [Member] Korea Subsidiaries [Member]	Dec. 31, 2013 ATK Term Loan due 2017 [Member] Korea Subsidiaries [Member]	Jun. 30, 2012 ATK Term Loan due 2017 [Member] Korea Subsidiaries [Member]	Dec. 31, 2013 ATK Term Loan due 2017 [Member] Tranche A [Member] Korea Subsidiaries [Member]	Dec. 31, 2013 ATK Term Loan due 2017 [Member] Tranche B [Member] Korea Subsidiaries [Member]	Dec. 31, 2013 Term Loan Due December 2019 [Member] Korea Subsidiaries [Member]	Dec. 31, 2012 Term Loan Due December 2019 [Member] Korea Subsidiaries [Member]	Nov. 30, 2012 Term Loan Due December 2019 [Member] Korea Subsidiaries [Member]	Dec. 31, 2013 $150 Million Senior Secured Credit Facility [Member]	Dec. 31, 2013 $150 Million Senior Secured Credit Facility [Member] Minimum [Member]	Dec. 31, 2013 $150 Million Senior Secured Credit Facility [Member] Maximum [Member]	Dec. 31, 2013 Revolving Credit Facility Due April 2015 [Member] Taiwan Subsidiaries [Member]	Dec. 31, 2012 Revolving Credit Facility Due April 2015 [Member] Taiwan Subsidiaries [Member]	Dec. 31, 2013 Senior Notes Due October 2022 First Issue [Member] Senior Notes Due October 2022 [Member]	May 31, 2013 Senior Notes Due October 2022 Second Issue [Member] Senior Notes Due October 2022 [Member]	Dec. 31, 2013 Revolving credit facility 2.00% due June 2016 [Member] Korea Subsidiaries [Member]	Dec. 31, 2012 Revolving credit facility 2.00% due June 2016 [Member] Korea Subsidiaries [Member]	Jun. 30, 2012 Revolving credit facility 2.00% due June 2016 [Member] Korea Subsidiaries [Member]
Debt Instruments [Abstract]
Credit facility, borrowing capacity						$ 150,000,000										$ 150,000,000						$ 100,000,000		$ 150,000,000	$ 50,000,000	$ 100,000,000			$ 100,000,000	$ 150,000,000			$ 44,000,000						$ 41,000,000
Repayments of Long-term Debt		80,000,000	420,116,000	392,191,000																			60,000,000
Debt Instrument, Periodic Payment, Principal						5,000,000
Line of Credit Facility, Current Borrowing Capacity							140,000,000								80,000,000					20,000,000							30,000,000						29,000,000				41,000,000
Debt Instrument, Interest Rate at Period End							3.76%	0.00%							3.95%		0.00%			4.29%	4.21%						3.95%	4.01%
Payments of Debt Issuance Costs		3,216,000	6,007,000	5,875,000
Borrowing under senior secured credit facility																																	0	0			0	0
Senior notes																		525,000,000	300,000,000																300,000,000	225,000,000
Interest rate							1.75%			6.00%		6.00%	6.00%		3.70%	3.80%		6.375%		2.30%							3.70%				1.50%	2.25%
Debt Instrument, Unamortized Premium Percentage																																				103.00%
Debt Instrument, Unamortized Premium		6,390,000	0																																	6,800,000
Debt Issuance Cost																																				3,400,000
Gains (Losses) on Extinguishment of Debt		(12,330,000)	(1,199,000)	(15,531,000)
Convertible Subordinated Debt										56,350,000	250,000,000
Debt Instrument Term					12 months																		5 years
Proceeds from Lines of Credit		5,000,000	0	0
Description of variable rate basis							foreign currency funding-linked base rate plus 1.75%								LIBOR plus 3.70%					foreign currency funding-linked rate plus 2.30%							LIBOR plus 3.70%			LIBOR plus 1.5%-2.25%			TAIFX plus a bank-determined spread
Step down provision																																	5,000,000
Loans Payable							10,000,000	0							70,000,000		0			80,000,000	100,000,000						70,000,000	13,000,000
Debt Instrument, Convertible, Conversion Price												$ 3.02
Face amount, related party														150,000,000
Debt Conversion, Converted Instrument, Shares Issued									64.0
Payments of Debt Exchange Costs	11,600,000	11,619,000	0	0
Common stock issuance for conversion of related party 6.25% convertible subordinated notes		$ 0	$ 0	$ 100,000,000					$ 193,700,000