SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Revenue Recognition
Accounts receivable, less allowances			$ 47,901	$ 43,811	$ 55,568
Selling, marketing and administrative expenses			157,503	152,675	155,012
Advertising expense			$ 5,841	3,040	2,708
Number of reportable segment | segment			1
Royalty income (as a percent)			0.10%
Rental income (as a percent)			1.00%
Investments:
Other income (expense), net			$ 36,297	26,366	18,066
Unrealized gains (losses) on investments			433	4,674	8,509
Inventories:
Inventories at cost, last-in, first-out (LIFO) method			67,096	69,692
Excess of current cost over LIFO cost of inventories			44,238	42,481
Foreign inventories at cost, first-in, first-out (FIFO) method			$ 8,086	7,933
Revision of Prior Period, Error Correction, Adjustment [Member]
Investments:
Other income (expense), net	$ 4,495	$ 3,231
Unrealized gains (losses) on investments	$ (4,495)	$ (3,231)
Minimum
Investments:
Marketable securities, maturity period			3 years
Maximum
Investments:
Marketable securities, maturity period			5 years
Shipping and Handling
Revenue Recognition
Selling, marketing and administrative expenses			$ 56,780	$ 57,581	$ 65,465