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v3.24.1.u1

Debt (Details) |  | 1 Months Ended | 3 Months Ended | 4 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2023 USD ($) | Feb. 28, 2024 | Mar. 31, 2024 USD ($) | Sep. 30, 2023 | Mar. 31, 2024 KRW (₩) | Mar. 31, 2023 | Mar. 31, 2022 USD ($) | Feb. 28, 2022 USD ($) | Apr. 30, 2021 KRW (₩) borrowing
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Total debt | $ 1,209,785,000 |  | $ 1,156,838,000 |  |  |  |  |  |
Less: Unamortized discount and deferred debt costs, net | (6,329,000) |  | (5,524,000) |  |  |  |  |  |
Less: Short-term borrowings and current portion of long-term debt | (131,624,000) |  | (112,968,000) |  |  |  |  |  |
Long-term debt | 1,071,832,000 |  | 1,038,346,000 |  |  |  |  |  |
Collateralized debt |  |  | 627,700,000 |  |  |  |  |  |
Asset Pledged as Collateral |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Collateralized debt |  |  | 319,000,000 |  |  |  |  |  |
Short-term term loans, variable rate | Japan | Subsidiary Term Loans |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Total debt | 5,098,000 |  | 4,136,000 |  |  |  |  |  |
Borrowing capacity available |  |  | $ 2,900,000 |  |  |  |  |  |
Short-term term loans, variable rate | Japan | Subsidiary Term Loans | Weighted Average |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Weighted average interest rate (as a percent) |  |  | 0.25% |  | 0.25% |  |  |  |
Short-term term loans, variable rate | Japan | TIBOR | Subsidiary Term Loans | Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  |  | 0.18% |  |  |  |  |  |
Short-term term loans, variable rate | Japan | TIBOR | Subsidiary Term Loans | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  |  | 0.20% |  |  |  |  |  |
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 1.85%, due April 2024 | Korea |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  | 1.85% |  | 1.85% |  |  |  |
Total debt | 0 |  | $ 0 |  |  |  |  |  |
Face amount of debt | ₩ |  |  |  |  |  |  |  |  | ₩ 80,000,000,000
Number of annual borrowings | borrowing |  |  |  |  |  |  |  |  | 6
Borrowing capacity available |  |  | $ 59,000,000 |  | ₩ 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 1.35%, due December 2024 | Japan |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  | 1.35% |  | 1.35% |  |  |  |
Total debt | 40,414,000 |  | $ 28,246,000 |  |  |  |  |  |
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 | 30,913,000 |  | $ 25,206,000 |  |  |  |  |  |
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 | 55,729,000 |  | $ 47,605,000 |  |  |  |  |  |
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 | 89,053,000 |  | $ 77,800,000 |  |  |  |  |  |
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 | 124,078,000 |  | $ 109,845,000 |  |  |  |  |  |
Subsidiary Term Loans | Term loans, SOFR plus 0.75%, weighted average of $6.06% as of March 31, 2024, due June 2025 | China |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Total debt | 37,000,000 |  | $ 37,000,000 |  |  |  |  |  |
Subsidiary Term Loans | Term loans, SOFR plus 0.75%, weighted average of $6.06% as of March 31, 2024, due June 2025 | China | SOFR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  |  |  | 0.75% |  |  |  |  |
Weighted average interest rate (as a percent) |  |  | 6.06% |  | 6.06% |  |  |  |
Subsidiary Term Loans | Term loans, SOFR plus 0.75%, weighted average of $6.06% as of March 31, 2024, due 2025 | China |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Total debt | 57,500,000 |  | $ 57,000,000 |  |  |  |  |  |
Subsidiary Term Loans | Term loans, SOFR plus 0.75%, weighted average of $6.06% as of March 31, 2024, due 2025 | China | SOFR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  |  |  | 0.75% |  |  |  |  |
Weighted average interest rate (as a percent) |  |  | 6.06% |  | 6.06% |  |  |  |
Subsidiary Term Loans | Term loans, SOFR plus 0.95% December 2026 | China |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Total debt | $ 45,000,000 |  | $ 45,000,000 |  |  |  |  |  |
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) |  |  | 6.27% |  | 6.27% |  |  |  |
Subsidiary Term Loans | Term loans, SOFR plus 0.95% December 2026 | China | SOFR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate spread (as a percent) |  | 0.95% |  |  |  |  |  |  |
Subsidiary Term Loans | Term Loans, SOFR Plus 1.40%, Due December 2026 | China | SOFR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate spread (as a percent) | 1.40% |  |  |  |  |  |  |  |
Line of Credit | Credit facility, TAIFX plus the applicable bank rate, due December 2024 (Taiwan) | Revolving Credit Facility | Taiwan |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Total debt | $ 0 |  | $ 0 |  |  |  |  |  |
Borrowing capacity available |  |  | 15,000,000 |  |  |  |  |  |
Credit facility, borrowing capacity |  |  |  |  |  |  | $ 15,000,000 | $ 36,000,000 |
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% |  |  |
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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