INCOME TAXES (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets:
Doubtful accounts	$ 1,507	$ 1,811
Inventory related items	28,245	29,266
Tax credits	9,072	6,015
Accrued vacation	2,761	2,556
Accrued bonus	5,515	997
Stock compensation	10,093	10,426
Deferred revenue	2,173	2,395
Net operating loss carryforwards	33,350	37,492
Unrealized foreign exchange loss	1,405	1,177
Charitable contributions carryforward	1,994	1,287
Others	8,835	3,077
Total deferred tax assets	104,950	96,499	$ 78,200
Less valuation allowance	(6,973)	(7,961)	$ (3,600)
Deferred tax assets after valuation allowance	97,977	88,538
Liabilities:
Intangible and fixed assets	(144,861)	(146,327)
Others	(4,089)	(1,091)
Total deferred tax liabilities	(148,950)	(147,418)
Total net deferred tax liabilities	$ (50,973)	$ (58,880)