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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS - Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | $ (2,559) | $ (5,044) | $ (1,462) | $ (7,344)
Other comprehensive income (loss) before reclassifications | (588) | (692) | (1,642) | 1,628
Amounts reclassified from accumulated other comprehensive loss | (42) | (21) | (85) | (41)
Net-current period other comprehensive income (loss) | (630) | (713) | (1,727) | 1,587
Ending balance | (3,189) | (5,757) | (3,189) | (5,757)
Unrealized Gains and Losses on Marketable Securities |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | (432) | (3,151) | 256 | (5,323)
Other comprehensive income (loss) before reclassifications | (317) | (144) | (1,005) | 2,028
Amounts reclassified from accumulated other comprehensive loss | 0 | 0 | 0 | 0
Net-current period other comprehensive income (loss) | (317) | (144) | (1,005) | 2,028
Ending balance | (749) | (3,295) | (749) | (3,295)
Defined Benefit Pension Items |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | 1,542 | 842 | 1,585 | 862
Other comprehensive income (loss) before reclassifications | 0 | 0 | 0 | 0
Amounts reclassified from accumulated other comprehensive loss | (42) | (21) | (85) | (41)
Net-current period other comprehensive income (loss) | (42) | (21) | (85) | (41)
Ending balance | 1,500 | 821 | 1,500 | 821
Foreign Currency Items |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | (3,669) | (2,735) | (3,303) | (2,883)
Other comprehensive income (loss) before reclassifications | (271) | (548) | (637) | (400)
Amounts reclassified from accumulated other comprehensive loss | 0 | 0 | 0 | 0
Net-current period other comprehensive income (loss) | (271) | (548) | (637) | (400)
Ending balance | $ (3,940) | $ (3,283) | $ (3,940) | $ (3,283)

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