Short-Term Borrowings and Long-Term Debt - Schedule of Short-term Borrowings (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Borrowing Limit	$ 1,532,499
Total short-term borrowings	172,368	$ 156,678
Line of credit
Line of Credit Facility [Line Items]
Borrowing Limit	176,416
Total principal short-term borrowings	172,699	156,985
Less: unamortized discounts	(331)	(307)
Total short-term borrowings	172,368	156,678
Line of credit | Credit Facility, Maturing January 2022
Line of Credit Facility [Line Items]
Borrowing Limit	132,744
Total principal short-term borrowings	$ 132,744	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	$ 43,672
Total principal short-term borrowings	$ 39,955	$ 19,117
Line of credit | Credit Facility, Maturing June 2022 | Minimum
Line of Credit Facility [Line Items]
Interest rate (%)	3.25%
Line of credit | Credit Facility, Maturing June 2022 | Maximum
Line of Credit Facility [Line Items]
Interest rate (%)	4.00%