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ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
BALANCE |  | $ 1,275,369 | $ 1,099,914 | $ 912,714
Reclassification to net income |  | 1,000 | 2,000 | 4,700
Other comprehensive loss |  | 17,366 | (217) | 17,784
BALANCE |  | 1,447,226 | 1,275,369 | 1,099,914
Unrealized gain (loss) on available-for-sale securities [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
BALANCE |  | (7,887) | (142) | 91
Other comprehensive gain (loss) before reclassification |  | 8,745 | (7,745) | (233)
Plan amendment cost |  |  |  | 0
Reclassification to net income | [1] | 0 | 0 | 0
Other comprehensive loss |  | 8,745 | (7,745) | (233)
BALANCE |  | 858 | (7,887) | (142)
Net unrealized gain (loss) on retirement plan [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
BALANCE | [2] | (10,011) | (18,019) | (36,075)
Other comprehensive gain (loss) before reclassification | [2] | 7,207 | 5,971 | 13,620
Plan amendment cost | [2] |  |  | (283)
Reclassification to net income | [1],[2] | 996 | 2,037 | 4,719
Other comprehensive loss | [2] | 8,203 | 8,008 | 18,056
BALANCE | [2] | (1,808) | (10,011) | (18,019)
Change in cumulative foreign currency translation adjustment [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
BALANCE |  | (554) | (74) | (35)
Other comprehensive gain (loss) before reclassification |  | 418 | (480) | (39)
Plan amendment cost |  |  |  | 0
Reclassification to net income | [1] | 0 | 0 | 0
Other comprehensive loss |  | 418 | (480) | (39)
BALANCE |  | (136) | (554) | (74)
Accumulated Other Comprehensive Loss [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |  |
BALANCE |  | (18,452) | (18,235) | (36,019)
Other comprehensive gain (loss) before reclassification |  | 16,370 | (2,254) | 13,348
Plan amendment cost |  |  |  | (283)
Reclassification to net income | [1] | 996 | 2,037 | 4,719
Other comprehensive loss |  | 17,366 | (217) | 17,784
BALANCE |  | $ (1,086) | $ (18,452) | $ (18,235)
[1] | The Company reclassified amortization of prior service cost, actuarial loss and plan amendment cost for its retirement plan from accumulated other comprehensive loss to net income of $1.0 million, $2.0 million and $4.7 million for the years ended December 31, 2023, 2022 and 2021, respectively.
[2] | Refer to Note 17: Employee Retirement Plans

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