Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 3,916	$ 12,325
Accounts receivable, net	302,071	98,057
Inventories	127,784	141,355
Prepaid expenses and other assets	25,712	35,105
Total current assets	459,483	286,842
Property, plant and equipment, net	617,503	589,892
Operating lease assets	30,654	30,991
Goodwill and other intangible assets, net	18,477	18,582
Other assets	7,004	7,398
Total assets	1,133,121	933,705
Current liabilities
Accounts payable	23,136	19,935
Accrued expenses and other liabilities	50,529	44,064
Accrued warranty	4,600	4,600
Line of credit	369,500	222,000
Total current liabilities	447,765	290,599
Deferred income taxes	68,224	68,224
Operating lease liabilities	23,318	23,974
Non-current accrued warranty	22,077	20,999
Other long-term liabilities	11,560	11,560
Total liabilities	572,944	415,356
Commitments and contingencies
Stockholders' Equity:
Preferred stock, $0.01 par value, 3,000,000 shares authorized; none issued and outstanding	0	0
Common stock, $0.01 par value, 360,000,000 shares authorized; 140,901,926 and 140,841,833 shares issued and 108,803,516 and 108,743,423 share outstanding, at March 31, 2023 and December 31, 2022, respectively	1,409	1,408
Additional paid-in capital	132,235	131,539
Retained earnings	1,171,805	1,130,674
Treasury stock, at cost, 32,098,410 shares at March 31, 2023 and December 31, 2022	(745,272)	(745,272)
Total stockholders' equity	560,177	518,349
Total liabilities and stockholders' equity	$ 1,133,121	$ 933,705