Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 4,226	$ 12,325
Accounts receivable, net	266,808	98,057
Inventories	74,007	141,355
Prepaid expenses and other assets	24,403	35,105
Total current assets	369,444	286,842
Property, plant and equipment, net	645,656	589,892
Operating lease assets	29,099	30,991
Goodwill and other intangible assets, net	18,372	18,582
Other assets	7,244	7,398
Total assets	1,069,815	933,705
Current liabilities
Accounts payable	32,228	19,935
Accrued expenses and other liabilities	79,803	44,064
Accrued warranty	4,766	4,600
Line of credit	206,000	222,000
Total current liabilities	322,797	290,599
Deferred income taxes	68,224	68,224
Operating lease liabilities	21,916	23,974
Non-current accrued warranty	21,793	20,999
Other long-term liabilities	11,560	11,560
Total liabilities	446,290	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; 140,931,122 and 140,841,833 shares issued and 108,567,816 and 108,743,423 share outstanding, at June 30, 2023 and December 31, 2022, respectively	1,409	1,408
Additional paid-in capital	134,293	131,539
Retained earnings	1,248,841	1,130,674
Treasury stock, at cost, 32,363,306 shares at June 30, 2023 and 32,098,410 shares at December 31, 2022	(761,018)	(745,272)
Total stockholders' equity	623,525	518,349
Total liabilities and stockholders' equity	$ 1,069,815	$ 933,705