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Financing Arrangements (Details) - USD ($) $ in Thousands | Jan. 30, 2015 | Sep. 30, 2022 | Dec. 31, 2021 | Jul. 31, 2020
--- | --- | --- | --- | ---
Financing Arrangements |  |  |  |
Long-term finance lease obligation |  | $ 45,508 | $ 46,415 |
Sale leaseback obligation |  |  |  |
Financing Arrangements |  |  |  |
Long-term finance lease obligation |  | 46,700 |  |
Security deposit |  | 5,900 |  |
Beverly Property Owner LLC | Building |  |  |  |
Financing Arrangements |  |  |  |
Proceeds from sale of corporate headquarters | $ 48,900 |  |  |
Lease term | 22 years |  |  |
Silicon Valley Bank | Revolving credit facility |  |  |  |
Financing Arrangements |  |  |  |
Maximum borrowing capacity under the credit facility |  |  |  | $ 40,000
Borrowings amount |  | 0 |  |
Silicon Valley Bank | Revolving credit facility | Letter of credit |  |  |  |
Financing Arrangements |  |  |  |
Letter of credit |  | $ 5,900 |  |

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