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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Cash flows from operating activities:    
Net income $ 64,246 $ 65,046
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 35,152 32,245
Amortization of deferred loan costs 307 1,085
Stock-based compensation 4,896 3,442
Stock Based Compensation - Restricted Stock   80
Provision for bad debts 145 114
Loss on disposition of assets 88 8
Non-cash operating lease expense 30 (1)
Changes in operating assets and liabilities:    
Receivables (1,546) (1,153)
Income taxes receivable 22,298 2,300
Inventories 374 625
Prepaid expenses 609 (197)
Accounts payable 5,118 (2,065)
Accrued expenses 2,692 4,655
Net cash provided by operating activities 134,409 106,184
Cash flows from investing activities:    
Proceeds from sale of assets 97 138
Change in construction accounts payable (2,554) (9,243)
Acquisition of property and equipment (32,164) (31,425)
Net cash used in investing activities (34,621) (40,530)
Cash flows from financing activities:    
Payroll taxes from net exercise of stock options (208) (2,468)
Proceeds from exercise of stock options 1,652 5,927
Line-of-credit borrowings 68,000 3,000
Line-of-credit payments (60,000) (3,000)
Principal payments on long-term debt (7,000) (63,000)
Loan issuance cost   (6,500)
Payment of dividends (107,093)  
Net cash used in financing activities (104,649) (66,041)
Change in cash and cash equivalents (4,861) (387)
Cash and cash equivalents at beginning of period 38,779 33,526
Cash and cash equivalents at end of period 33,918 33,139
Supplemental disclosure of cash flow information:    
Cash paid for interest, net of amounts capitalized 1,810 1,139
Cash paid for income taxes $ 20,306 $ 13,800