Debt (Long Term Debt) (Details) $ in Thousands, ₩ in Billions, ¥ in Billions	1 Months Ended				12 Months Ended
	Feb. 18, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 JPY (¥)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 KRW (₩)	Oct. 31, 2021 USD ($)	Apr. 30, 2021 KRW (₩)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Total debt		$ 1,146,775			$ 1,146,775				$ 1,164,302
Less: Unamortized discount and deferred debt costs, net		(8,779)			(8,779)				(9,956)
Less: Short-term borrowings and current portion of long-term debt		(153,008)			(153,008)				(149,007)
Long-term debt		984,988			984,988				1,005,339
6.625% Senior notes, due September 2027 | Senior notes
Debt Instrument [Line Items]
Total debt		$ 525,000			$ 525,000				525,000
Interest rate (as a percent)		6.625%			6.625%	6.625%
Other
Debt Instrument [Line Items]
Total debt		$ 0			$ 0				2,039
$250 million senior secured revolving credit facility, LIBOR plus 1.25%-1.75%, due July 2023 (Singapore) | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Total debt		0			0				0
Credit facility, borrowing capacity		250,000			250,000
Remaining borrowing capacity		250,000			250,000
Korea | Revolving Credit Facility due October 2022 | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Total debt		$ 0			$ 0
Interest rate (as a percent)		1.11%			1.11%	1.11%
Credit facility, borrowing capacity		$ 30,000			$ 30,000
Korea | Revolfing Credit Facility, due October 2021 | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Total debt									0
Korea | Term loan, applicable bank rate plus 1.77%, April 2023 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 47,064			$ 47,064				51,541
Korea | Term loan, applicable bank rate plus 1.77%, April 2023 | Subsidiary Term Loans | Applicable Bank Rate
Debt Instrument [Line Items]
Interest rate (as a percent)		1.77%			1.77%	1.77%
Korea | Term Loan fixed rate at 1.85% due April 2024 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 0			$ 0				0
Interest rate (as a percent)		1.85%			1.85%	1.85%
Amount of unused borrowing capacity		$ 67,000			$ 67,000	₩ 80.0
Amount of debt agreement | ₩								₩ 80.0
Proceeds from issuance of long-term debt					138,600
Repayments of debt					138,600
Korea | Term loan, applicable bank rate plus 1.98%, due December 2028 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 50,000			$ 50,000				50,000
Amount of debt agreement											$ 90,000
Weighted average interest rate		3.88%			3.88%	3.88%
Korea | Term loan, applicable bank rate plus 1.98%, due December 2028 | Subsidiary Term Loans | Applicable Bank Rate
Debt Instrument [Line Items]
Interest rate (as a percent)		1.98%			1.98%	1.98%
Korea | Term loan fixed rate at 2.12% due December 2028 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 50,000			$ 50,000				0
Interest rate (as a percent)		2.12%			2.12%	2.12%
Amount of unused borrowing capacity		$ 150,000			$ 150,000
Amount of debt agreement							$ 200,000
Proceeds from issuance of long-term debt					50,000
Korea | Term loan fixed rate at 2.12% due December 2028 | Subsidiary Term Loans | Subsequent Event
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt	$ 50,000
Japan | Short-term term loans, variable rates | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		3,789			3,789				6,663
Amount of unused borrowing capacity		5,200			5,200
Japan | Term loan, fixed rate at 0.86%, due June 2022 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 4,345			$ 4,345				14,528
Interest rate (as a percent)		0.86%			0.86%	0.86%
Japan | Term loan, fixed rate at 0.60%, due July 2022 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 1,303			$ 1,303				3,390
Interest rate (as a percent)		0.60%			0.60%	0.60%
Japan | Term loan, fixed rate at 1.30%, due July 2023 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 79,075			$ 79,075				138,499
Interest rate (as a percent)		1.30%			1.30%	1.30%
Japan | Term loan, fixed rate at 1.35%, due December 2024 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 148,592			$ 148,592				220,823
Interest rate (as a percent)		1.35%			1.35%	1.35%
Japan | Term loan, fixed rate at 1.20%, due December 2025 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 75,773			$ 75,773				105,569
Interest rate (as a percent)		1.20%			1.20%	1.20%
Japan | Term Loan fixed rate at 1.2% due December 2026 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 113,834			$ 113,834				0
Interest rate (as a percent)		1.23%			1.23%	1.23%
Proceeds from issuance of long-term debt		$ 115,000	¥ 13.1
China | Term loan, LIBOR plus 1.60%, due March 2022 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 0			$ 0				28,000
Interest rate (as a percent)		1.60%			1.60%	1.60%
China | Term loan, LIBOR plus 1.40%, due March 2022 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 0			$ 0				18,250
Interest rate (as a percent)		1.40%			1.40%	1.40%
China | Term Loan LIBOR plus 1.10% due March 2024 | Subsidiary Term Loans
Debt Instrument [Line Items]
Total debt		$ 48,000			$ 48,000				0
Interest rate (as a percent)		1.10%			1.10%	1.10%
Proceeds from issuance of long-term debt				$ 50,000
China | Term Loan One, LIBOR plus 1.10% Due March 2024 | Subsidiary Term Loans
Debt Instrument [Line Items]
Amount of debt agreement				20,000
Amount of principal payments				500
China | Term Loan Two, LIBOR plus 1.10% Due March 2024 | Subsidiary Term Loans
Debt Instrument [Line Items]
Amount of debt agreement				30,000
Amount of principal payments				$ 500
Taiwan | Credit facility, TAIFX plus the applicable bank rate, due December 2024 | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Total debt		$ 0			$ 0				$ 0
Credit facility, borrowing capacity										$ 36,000
Amount of unused borrowing capacity		$ 36,000			$ 36,000
Amount of debt agreement										20,000
Long-term debt										$ 56,000
Minimum | $250 million senior secured revolving credit facility, LIBOR plus 1.25%-1.75%, due July 2023 (Singapore) | Revolving Credit Facility | Line of Credit | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate spread (as a percent)					1.25%
Maximum | $250 million senior secured revolving credit facility, LIBOR plus 1.25%-1.75%, due July 2023 (Singapore) | Revolving Credit Facility | Line of Credit | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate spread (as a percent)					1.75%