CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net income	$ 46,872	$ 40,957
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	26,786	24,891
Amortization of deferred loan costs	97
Stock-based compensation - stock options	4,002	3,551
Provision for bad debts	48	132
Loss (gain) on disposition of assets	2	63
Non-cash operating lease expense	(17)	16
Changes in operating assets and liabilities:
Receivables	(1,824)	1,997
Income taxes receivable	(1,396)	(574)
Inventories	929	(485)
Prepaid expenses and other	1,637	3,087
Accounts payable	(2,066)	(5,694)
Accrued expenses	(4,480)	(5,348)
Net cash provided by operating activities	70,590	62,593
Cash flows from investing activities:
Proceeds from sale of assets	25	49
Change in construction accounts payable	(487)	261
Acquisition of property and equipment	(27,923)	(30,974)
Net cash used in investing activities	(28,385)	(30,664)
Cash flows from financing activities:
Payroll taxes from net exercise of stock options		(38)
Proceeds from exercise of stock options	1,678	2,340
Line-of-credit borrowings		45,500
Line-of-credit payments		(28,000)
Payment of dividends	(11,039)	(11,229)
Purchase of company common stock	(20,014)	(50,355)
Net cash used in financing activities	(29,375)	(41,782)
Change in cash and cash equivalents	12,830	(9,853)
Cash and cash equivalents at beginning of period	58,760	43,361
Cash and cash equivalents at end of period	71,590	33,508
Supplemental disclosure of cash flow information:
Cash paid for interest	123	286
Cash paid for income taxes	$ 15,450	$ 12,740