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v3.25.1

Debt (Details) | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2025 USD ($) | Mar. 31, 2025 KRW (₩) | Dec. 31, 2024 USD ($) | May 31, 2024 USD ($) borrowing | May 31, 2024 KRW (₩) borrowing | Mar. 31, 2022 USD ($) | Apr. 30, 2021 KRW (₩) borrowing
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt | $ 1,153,912,000 |  | $ 1,164,462,000 |  |  |  |
Less: Unamortized discount and deferred debt costs, net | (4,590,000) |  | (5,002,000) |  |  |  |
Less: Short-term borrowings and current portion of long-term debt | (236,459,000) |  | (236,029,000) |  |  |  |
Long-term debt | 912,863,000 |  | 923,431,000 |  |  |  |
Collateralized debt | 628,900,000 |  |  |  |  |  |
Asset Pledged as Collateral |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Collateralized debt | 292,400,000 |  |  |  |  |  |
Short-term term loans, variable rate | Japan | Subsidiary Term Loans |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt | 0 |  | 0 |  |  |  |
Borrowing capacity available | $ 3,300,000 |  |  |  |  |  |
Senior Notes | 6.625% Senior notes, due September 2027 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) | 6.625% | 6.625% |  |  |  |  |
Total debt | $ 525,000,000 |  | 525,000,000 |  |  |  |
Subsidiary Term Loans | Term loan, fixed rate at 3.95%, due May 2027 | Korea |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) | 3.95% | 3.95% |  |  |  |  |
Total debt | $ 0 |  | 0 |  |  |  |
Number of annual borrowings | borrowing |  |  |  | 6 | 6 |  | 6
Borrowing capacity available | $ 54,000,000 | ₩ 80,000,000,000 |  |  |  |  |
Subsidiary Term Loans | Term loan, fixed rate at 2.12%, due December 2028 | Korea |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) | 2.12% | 2.12% |  |  |  |  |
Total debt | $ 200,000,000 |  | 200,000,000 |  |  |  |
Subsidiary Term Loans | Term loan, fixed rate at 1.20%, due December 2025 | Japan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) | 1.20% | 1.20% |  |  |  |  |
Total debt | $ 10,903,000 |  | 13,868,000 |  |  |  |
Subsidiary Term Loans | Term loan, fixed rate at 1.23%, due December 2026 | Japan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) | 1.23% | 1.23% |  |  |  |  |
Total debt | $ 30,575,000 |  | 33,333,000 |  |  |  |
Subsidiary Term Loans | Term loan, fixed rate at 1.59%, due December 2027 | Japan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) | 1.59% | 1.59% |  |  |  |  |
Total debt | $ 57,582,000 |  | 59,923,000 |  |  |  |
Subsidiary Term Loans | Term loan, fixed rate at 1.80%, due December 2028 | Japan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) | 1.80% | 1.80% |  |  |  |  |
Total debt | $ 87,523,000 |  | 89,059,000 |  |  |  |
Subsidiary Term Loans | Term loan, fixed rate at 2.05%, due December 2029 | Japan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) | 2.05% | 2.05% |  |  |  |  |
Total debt | $ 108,329,000 |  | 108,779,000 |  |  |  |
Subsidiary Term Loans | Term loans, SOFR plus 0.75%, weighted average of 5.06% as of March 31, 2025, due June 2025 | China |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate spread (as a percent) | 0.75% |  |  |  |  |  |
Weighted average interest rate (as a percent) | 5.06% | 5.06% |  |  |  |  |
Total debt | $ 35,000,000 |  | 35,000,000 |  |  |  |
Subsidiary Term Loans | Term loans, SOFR plus 0.75%, weighted average of 5.06% as of March 31, 2025, due 2025 | China |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate spread (as a percent) | 0.75% |  |  |  |  |  |
Weighted average interest rate (as a percent) | 5.06% | 5.06% |  |  |  |  |
Total debt | $ 55,000,000 |  | 55,500,000 |  |  |  |
Subsidiary Term Loans | Term loans, SOFR plus 0.95% December 2026 | China |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate spread (as a percent) | 0.95% |  |  |  |  |  |
Total debt | $ 44,000,000 |  | 44,000,000 |  |  |  |
Subsidiary Term Loans | Term loans, SOFR plus 0.95% December 2026 | China | Weighted Average |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted average interest rate (as a percent) | 5.25% | 5.25% |  |  |  |  |
Subsidiary Term Loans | Term Loan, fixed rate at 1.85%, Due April2024 | Korea |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) | 1.85% | 1.85% |  |  |  |  |
Face amount of debt | ₩ |  |  |  |  |  |  | ₩ 80,000,000,000
Borrowing capacity available |  |  |  | $ 59,000,000 | ₩ 80,000,000,000.0 |  |
Line of Credit | $600.0 million senior secured revolving credit facility, applicable bank rate plus 1.75%, due March 2027 (Singapore) | Revolving Credit Facility | Singapore |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) | 1.75% | 1.75% |  |  |  |  |
Total debt | $ 0 |  | $ 0 |  |  |  |
Borrowing capacity available | $ 600,000,000 |  |  |  |  |  |
Credit facility, borrowing capacity |  |  |  |  |  | $ 600,000,000 |
Credit facility, base amount |  |  |  |  |  | $ 250,000,000 |
Credit facility percentage of variable borrowings |  |  |  |  |  | 37.50% |

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