CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net income	$ 65,046	$ 48,617
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	32,245	28,308
Amortization of deferred loan costs	1,085	630
Stock-based compensation	3,442	3,099
Stock Based Compensation - Restricted Stock	80
Provision for bad debts	114	44
Loss on disposition of assets	8	138
Non-cash operating lease expense	(1)
Deferred income taxes		1
Changes in operating assets and liabilities:
Receivables	(1,153)	(4,936)
Income taxes receivable	2,300	3,571
Inventories	625	1,706
Prepaid expenses	(197)	1,721
Right of use asset, net		(13)
Accounts payable	(2,065)	3,281
Accrued expenses	4,655	10,110
Net cash provided by operating activities	106,184	96,277
Cash flows from investing activities:
Proceeds from sale of assets	138	20
Change in construction accounts payable	(9,243)	5,309
Acquisition of property and equipment	(31,425)	(26,992)
Net cash used in investing activities	(40,530)	(21,663)
Cash flows from financing activities:
Payroll taxes from net exercise of stock options	(2,468)	(730)
Proceeds from exercise of stock options	5,927	5,342
Line-of-credit borrowings	3,000
Line-of-credit payments	(3,000)
Principal payments on long-term debt	(63,000)	(74,500)
Loan issuance cost	(6,500)
Net cash (used in) provided by financing activities	(66,041)	(69,888)
Change in cash and cash equivalents	(387)	4,726
Cash and cash equivalents at beginning of period	33,526	28,310
Cash and cash equivalents at end of period	33,139	33,036
Supplemental disclosure of cash flow information:
Cash paid for interest, net of amounts capitalized	1,139	2,207
Cash paid for income taxes	$ 13,800	$ 8,100