CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
OPERATING ACTIVITIES:
Net income	$ 34,113	$ 22,439
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	6,137	6,054
Amortization of deferred financing costs	6	2
Deferred income taxes	(571)	(238)
Loss (gain) on disposition of property, plant and equipment	106	(93)
Stock-based compensation	2,336	1,241
Changes in operating assets and liabilities:
Trade receivables, net	(11,790)	(4,103)
Inventories	(174)	(1,411)
Prepaid expenses and other current assets	1,012	639
Other assets	164	15
Accounts payable and accrued expenses	8,113	2,643
Other liabilities	(18)	(21)
Net cash provided by operating activities	39,434	27,167
INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(14,852)	(6,824)
Proceeds from sale of property, plant and equipment	4	156
Net cash used in investing activities	(14,848)	(6,668)
FINANCING ACTIVITIES:
Cash dividends paid	(1,719)	(1,426)
Proceeds from exercise of stock options	160	130
Purchase of treasury shares	(424)	(172)
Net cash used in financing activities	(1,983)	(1,468)
Net increase in cash and cash equivalents	22,603	19,031
Cash and cash equivalents at beginning of period	278,031	187,964
Cash and cash equivalents at end of period	$ 300,634	$ 206,995