CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income	$ 40,957	$ 40,083
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	24,891	22,955
Amortization of deferred loan costs		307
Stock-based compensation - stock options	3,551	2,750
Provision for bad debts	132	44
Loss on disposition of assets	63	58
Non-cash operating lease expense	16	10
Changes in operating assets and liabilities:
Receivables	1,997	1,462
Income taxes receivable	(574)	20,390
Inventories	(485)	392
Prepaid expenses	3,087	1,529
Accounts payable	(5,694)	616
Accrued expenses	(5,348)	(2,681)
Net cash provided by operating activities	62,593	87,915
Cash flows from investing activities:
Proceeds from sale of assets	49	91
Change in construction accounts payable	261	(2,508)
Acquisition of property and equipment	(30,974)	(23,202)
Net cash used in investing activities	(30,664)	(25,619)
Cash flows from financing activities:
Payroll taxes from net exercise of stock options	(38)	(99)
Proceeds from exercise of stock options	2,340	1,473
Line-of-credit borrowings	45,500	61,000
Line-of-credit payments	(28,000)	(20,000)
Principal payments on long-term debt		(7,000)
Payment of dividends	(11,229)	(101,349)
Purchase of company common stock	(50,355)
Net cash used in financing activities	(41,782)	(65,975)
Change in cash and cash equivalents	(9,853)	(3,679)
Cash and cash equivalents at beginning of period	43,361	38,779
Cash and cash equivalents at end of period	33,508	35,100
Supplemental disclosure of cash flow information:
Cash paid for interest	286	1,342
Cash paid for income taxes	$ 12,740	$ 14,766