CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net income	$ 72,769	$ 82,448	$ 87,479
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	51,359	47,294	43,433
Amortization of deferred loan costs		307	1,541
Amortization of deferred loan costs	(418)
Stock-based compensation - stock options	7,864	7,112	5,095
Stock-based compensation - restricted stock		364	80
Provision for bad debts	234	194	155
Loss (gain) on disposition of assets	249	159	(69)
Non-cash operating lease expense	24	39	9
Deferred income taxes	(9,736)	68	3,399
Changes in operating assets and liabilities:
Receivables	1,499	(2,618)	(840)
Income taxes receivable	(517)	23,983	1,957
Inventories	(1,682)	(56)	(399)
Prepaid expenses and other	409	(2,458)	(985)
Accounts payable	18,151	8,674	(4,157)
Accrued expenses	506	7,536	3,070
Net cash provided by operating activities	140,711	173,046	139,768
Cash flows from investing activities:
Proceeds from sale of assets	110	170	440
Change in construction accounts payable	3,535	(2,391)	(8,934)
Acquisition of property and equipment	(47,432)	(49,005)	(39,477)
Net cash used in investing activities	(43,787)	(51,226)	(47,971)
Cash flows from financing activities:
Payroll taxes from net exercise of stock options	(2,013)	(464)	(6,885)
Proceeds from exercise of stock options	8,221	2,573	9,841
Line-of-credit borrowings	45,500	71,500	3,000
Line-of-credit payments	(51,000)	(66,000)	(3,000)
Principal payments on long-term debt		(7,000)	(83,000)
Payment of dividends	(22,265)	(112,819)
Purchase of company common stock	(59,968)	(5,028)	(6,500)
Net cash used in financing activities	(81,525)	(117,238)	(86,544)
Change in cash and cash equivalents	15,399	4,582	5,253
Cash and cash equivalents at beginning of period	43,361	38,779	33,526
Cash and cash equivalents at end of period	58,760	43,361	38,779
Supplemental disclosure of cash flow information:
Cash paid for interest	986	1,968	1,450
Cash paid for income taxes	$ 29,760	25,626	$ 15,620
Cash received - income taxes refunds		$ 23,758