Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 497,653	$ 84,441
Marketable securities	290,818	149,521
Accounts receivable (net of allowance for doubtful accounts of $1,814 and $1,631, respectively)	158,187	143,475
Inventories	453,592	209,361
Prepaid expenses and other assets	93,443	67,657
Restricted cash	4,218	3,777
Total current assets	1,497,911	658,232
Long-term marketable securities	167,767	120,022
Property, plant and equipment, net	677,444	594,796
Right of use assets	51,730	28,840
Goodwill	43,864	16,080
Intangible assets, net	53,175	10,708
Deferred income taxes	6,171	0
Other assets	60,882	32,720
TOTAL ASSETS	2,558,944	1,461,398
CURRENT LIABILITIES:
Current maturities of long-term debt	0	50,088
Current maturities of operating lease obligations	13,026	14,581
Accounts payable	162,847	132,938
Accrued expenses and other liabilities	53,884	34,875
Deferred revenue	16,856	13,488
Total current liabilities	246,613	245,970
Deferred income taxes	4,659	6,607
Long-term debt (net of debt issuance costs of $13,243 and $1,731, respectively)	536,757	15,158
Long-term operating lease obligations	38,989	15,223
Other liabilities	4,100	4,485
Total liabilities	831,118	287,443
COMMITMENTS AND CONTINGENCIES (NOTE 18)
EQUITY:
Common stock ($0.0001 par value; 300,000,000 shares authorized; 50,294,505 and 39,334,839 shares outstanding, respectively)	6	5
Common stock—additional paid-in-capital	709,186	392,247
Retained earnings	1,105,030	891,211
Accumulated other comprehensive income (loss)	(2,111)	1,160
Treasury stock (6,240,907 and 10,591,074 shares, respectively)	(84,285)	(110,668)
Total equity	1,727,826	1,173,955
TOTAL LIABILITIES AND EQUITY	$ 2,558,944	$ 1,461,398