Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 396,097	$ 268,670
Short-term investment securities	14,687	23,967
TOTAL CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENT SECURITIES	410,784	292,637
Accounts receivable, net of allowance for doubtful accounts of $21,490 at December 31, 2020 and $20,219 at December 31, 2019	124,093	202,219
Inventories	314,928	337,640
Prepaid income taxes	29,480	15,720
Prepaid expenses and other current assets	41,492	33,981
Total current assets	920,777	882,197
PROPERTY AND EQUIPMENT, net	466,628	456,085
Operating Lease, Right-of-Use Asset	46,571	34,465
LONG-TERM INVESTMENT SECURITIES	12,974	0
GOODWILL	33,001	31,245
INTANGIBLE ASSETS, net	197,231	211,408
Deferred Income Tax Assets, Net	31,034	27,998
Other Assets	55,475	48,984
TOTAL ASSETS	1,763,691	1,692,382
CURRENT LIABILITIES:
Accounts payable	71,864	128,629
Accrued liabilities	97,021	117,776
Accrued Income Taxes, Current	303	2,063
Business Combination, Contingent Consideration, Liability, Current	26,300	0
Total current liabilities	195,488	248,468
Business Combination, Contingent Consideration, Liability, Noncurrent	0	17,300
Other Liabilities	47,835	32,820
Deferred Income Tax Liabilities, Net	1,663	2,091
Accrued Income Taxes, Noncurrent	16,440	14,459
COMMITMENTS AND CONTINGENCIES	0	0
STOCKHOLDERS' EQUITY:
Convertible preferred stock, $1.00 par value Authorized-500 shares; Issued and outstanding - none	0	0
Common stock, $0.10 par value - Authorized-80,000 shares; Issued and outstanding 21,058 shares at December 31, 2020 and issued 20,743 shares at December 31, 2019 and outstanding 20,742 shares at December 31, 2019	2,106	2,074
Additional paid-in capital	693,068	668,947
Treasury Stock, Value	(39)	(157)
Retained earnings	808,652	721,782
Accumulated other comprehensive loss	(1,522)	(15,402)
Total stockholders' equity	1,502,265	1,377,244
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,763,691	$ 1,692,382