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