Short-Term Borrowings and Long-Term Debt - Schedule of Short-term Borrowings (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Borrowing Limit	$ 1,597,652
Total short-term borrowings	168,052	$ 156,678
Line of credit
Line of Credit Facility [Line Items]
Borrowing Limit	168,242
Total principal short-term borrowings	168,242	156,985
Less: unamortized discounts	(190)	(307)
Total short-term borrowings	168,052	156,678
Line of credit | Credit Facility, Maturing January 2022
Line of Credit Facility [Line Items]
Borrowing Limit	126,593
Total principal short-term borrowings	$ 126,593	137,868
Line of credit | Credit Facility, Maturing January 2022 | KRW Denominated Bank Certificate of Deposit Rate
Line of Credit Facility [Line Items]
Variable interest rate	3.25%
Line of credit | Credit Facility, Maturing June 2022
Line of Credit Facility [Line Items]
Borrowing Limit	$ 41,649
Total principal short-term borrowings	$ 41,649	$ 19,117
Line of credit | Credit Facility, Maturing June 2022 | Minimum
Line of Credit Facility [Line Items]
Interest rate (%)	3.20%
Line of credit | Credit Facility, Maturing June 2022 | Maximum
Line of Credit Facility [Line Items]
Interest rate (%)	4.00%