Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 424,249	$ 396,097	[1]
Short-term investment securities	11,693	14,687	[1]
TOTAL CASH, CASH EQUIVALENTS AND INVESTMENT SECURITIES	435,942	410,784	[1]
Accounts receivable, net of allowance for doubtful accounts of $21,782 at March 31, 2021 and $21,490 at December 31, 2020	120,365	124,093	[1]
Inventories	300,086	314,928	[1]
Prepaid income taxes	31,480	29,480	[1]
Prepaid expenses and other current assets	40,309	41,492	[1]
TOTAL CURRENT ASSETS	928,182	920,777	[1]
PROPERTY AND EQUIPMENT, net	459,072	466,628	[1]
Operating Lease, Right-of-Use Asset	45,259	46,571	[1]
Long-term investment securities	18,834	12,974
GOODWILL	32,952	33,001	[1]
INTANGIBLE ASSETS, net	193,074	197,231	[1]
Deferred Income Tax Assets	29,115	31,034
OTHER ASSETS	58,742	55,475	[1]
TOTAL ASSETS	1,765,230	1,763,691	[1]
CURRENT LIABILITIES:
Accounts payable	73,049	71,864	[1]
Accrued liabilities	79,056	97,021	[1]
Income tax liability	1,457	303	[1]
Contingent earn-out liability	26,300	26,300
TOTAL CURRENT LIABILITIES	179,862	195,488	[1]
Other long-term liabilities	46,110	47,835
DEFERRED INCOME TAXES	1,663	1,663	[1]
INCOME TAX LIABILITY	16,827	16,440	[1]
COMMITMENTS AND CONTINGENCIES	0	0	[1]
STOCKHOLDERS' EQUITY:
Convertible preferred stock, $1.00 par value Authorized-500 shares; Issued and outstanding - none	0	0	[1]
Common stock, $0.10 par value - Authorized-80,000 shares; Issued 21,219 shares at March 31, 2021 and 21,058 shares at December 31, 2020 and outstanding 21,192 shares at March 31, 2021 and 21,058 shares at December 31, 2020	2,122	2,106	[1]
Additional paid-in capital	701,586	693,068	[1]
Treasury Stock, at cost (26,785 and 209 shares, respectively)	(5,410)	(39)	[1]
Retained earnings	832,383	808,652	[1]
Accumulated other comprehensive loss	(9,913)	(1,522)	[1]
TOTAL STOCKHOLDERS' EQUITY	1,520,768	1,502,265	[1]
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,765,230	$ 1,763,691	[1]

[1] December 31, 2020 balances were derived from audited consolidated financial statements.