CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
OPERATING ACTIVITIES:
Net income	$ 81,849	$ 57,549
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	18,125	17,783
Amortization of deferred financing costs	2	9
Deferred income taxes	(825)	(319)
Gain on disposition of property, plant and equipment	(46)	(85)
Stock-based compensation	3,590	2,396
Changes in operating assets and liabilities:
Trade receivables, net	(14,853)	(10,469)
Inventories	(3,470)	(4,199)
Prepaid expenses and other current assets	1,891	1,185
Other assets	17	(159)
Accounts payable and accrued expenses	1,214	949
Other liabilities	(80)	42
Net cash provided by operating activities	87,414	64,682
INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(16,371)	(20,541)
Proceeds from sale of property, plant and equipment	344	2,180
Net cash used in investing activities	(16,027)	(18,361)
FINANCING ACTIVITIES:
Cash dividends paid	(4,287)	(3,415)
Proceeds from exercise of stock options	130	113
Purchase of treasury shares	(172)	(98)
Net cash used in financing activities	(4,329)	(3,400)
Net increase in cash and cash equivalents	67,058	42,921
Cash and cash equivalents at beginning of period	187,964	133,384
Cash and cash equivalents at end of period	$ 255,022	$ 176,305