CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
OPERATING ACTIVITIES:
Net income	$ 64,944	$ 48,496
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	12,332	12,017
Amortization of deferred financing costs	6	2
Deferred income taxes	(2,289)	(401)
Loss (gain) on disposition of property, plant and equipment	290	(53)
Stock-based compensation	4,307	2,387
Changes in operating assets and liabilities:
Trade receivables, net	(10,410)	(8,232)
Inventories	2,091	(2,987)
Prepaid expenses and other current assets	1,534	1,174
Other assets	171	(1,564)
Accounts payable and accrued expenses	528	(2,430)
Other liabilities	(39)	(45)
Net cash provided by operating activities	73,465	48,364
INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(28,126)	(11,220)
Proceeds from sale of property, plant and equipment	241	292
Net cash used in investing activities	(27,885)	(10,928)
FINANCING ACTIVITIES:
Cash dividends paid	(3,437)	(2,857)
Proceeds from exercise of stock options	160	130
Purchase of treasury shares	(424)	(172)
Net cash used in financing activities	(3,701)	(2,899)
Net increase in cash and cash equivalents	41,879	34,537
Cash and cash equivalents at beginning of period	278,031	187,964
Cash and cash equivalents at end of period	$ 319,910	$ 222,501