Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
OPERATING ACTIVITIES
Net income	$ 41,131	$ 71,211
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	11,915	10,473
Stock-based compensation	1,972	2,226
Other non-cash adjustments	121	77
Changes in operating assets and liabilities:
Accounts receivable	(204,014)	(49,825)
Inventories	13,571	(14,423)
Prepaid expenses and other assets	291	1,560
Accounts payable	2,975	36,605
Accrued expenses and other liabilities	3,361	(6,149)
Income taxes receivable/payable	13,206	22,124
Net cash (used in) provided by operating activities	(115,471)	73,879
INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(39,192)	(22,288)
Net cash used in investing activities	(39,192)	(22,288)
FINANCING ACTIVITIES
Borrowings under line of credit	200,500
Principal payments under line of credit	(53,000)
Repurchases of common stock	(1,592)	(77,929)
Proceeds from employee stock purchase and option plans	316	523
Financing costs	30	(50)
Net cash provided by (used in) financing activities	146,254	(77,456)
Net decrease in cash and cash equivalents	(8,409)	(25,865)
Cash and cash equivalents, beginning of period	12,325	141,053
Cash and cash equivalents, end of period	3,916	115,188
Supplemental Disclosure:
Cash paid for interest, net of capitalized interest	1,817
Cash paid for income taxes, net	733	1,604
Capital expenditures in accounts payable	$ 229	$ 239