Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
OPERATING ACTIVITIES
Net income	$ 183,433	$ 174,549
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	37,194	33,269
Stock-based compensation	7,384	3,531
Loss (gain) on disposal of property, plant and equipment	1,081	(43)
Other non-cash adjustments	(169)	(171)
Changes in operating assets and liabilities:
Accounts receivable	(102,852)	62,343
Inventories	80,971	(48,362)
Prepaid expenses and other assets	4,376	7,125
Accounts payable	10,678	(3,769)
Accrued expenses and other liabilities	39,039	8,842
Income taxes receivable/payable	27,090	7,079
Net cash provided by operating activities	288,225	244,393
INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(112,920)	(108,163)
Proceeds from sales of property, plant and equipment		45
Net cash used in investing activities	(112,920)	(108,118)
FINANCING ACTIVITIES
Borrowings under line of credit	509,500	156,000
Principal payments under line of credit	(675,000)	(80,000)
Repurchases of common stock	(18,441)	(347,957)
Proceeds from employee stock purchase and option plans	925	1,381
Financing costs	30	(867)
Net cash used in financing activities	(182,986)	(271,443)
Net decrease in cash and cash equivalents	(7,681)	(135,168)
Cash and cash equivalents, beginning of period	12,325	141,053
Cash and cash equivalents, end of period	4,644	5,885
Supplemental Disclosure:
Cash paid for interest, net of capitalized interest	4,165
Cash paid for income taxes, net	35,106	50,585
Supplemental non-cash investing and financing disclosure:
Capital expenditures in accounts payable	$ 1,183	$ 787