INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets:
Doubtful accounts	$ 2,207	$ 2,426
Inventory related items	47,034	39,548
Tax credits	18,319	19,134
Accrued vacation	3,403	3,206
Accrued bonus	4,883	6,017
Stock compensation	6,160	8,347
Deferred revenue	1,665	1,805
Net operating loss carryforwards	29,335	37,418
Capitalization of research and development expenses	13,044	9,781
Unrealized foreign exchange loss	23,798	8,105
Charitable contributions carryforward	203	235
Leases and Other	23,205	12,496
Total deferred tax assets	173,256	148,518
Less valuation allowance	(9,897)	(9,865)
Deferred tax assets after valuation allowance	163,359	138,653
Liabilities:
Intangible and fixed assets	(90,274)	(150,879)
Leases and Other	(15,585)	(11,704)
Total deferred tax liabilities	(105,859)	(162,583)
Total net deferred tax assets	$ 57,500
Total net deferred (liabilities)		$ (23,930)