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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Cash flows from operating activities    
Net income $ 57,286 $ 113,626
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 51,608 53,868
Change in non-cash lease expense 411 660
Share-based compensation 6,436 5,255
Amortization of debt issuance costs and discounts on debt 2,236 2,329
Loss on disposal of assets 669 819
Provision for credit losses 300 217
Deferred income taxes (16,914) 433
Loss on debt extinguishment 1,254 0
Changes in operating assets and liabilities:    
Accounts receivable (139) (67,122)
Prepaid expenses, inventories and other current assets (5,727) (7,095)
Other assets (1,985) (872)
Accounts payable and other accrued expenses (3,279) 17,793
Other liabilities (1,104) (540)
Net cash provided by operating activities 91,052 119,371
Cash flows from investing activities    
Purchase of property and equipment, net of change in construction payables (21,015) (11,438)
Proceeds from disposal of property and equipment 102 226
Net cash used in investing activities (20,913) (11,212)
Cash flows from financing activities    
Repayments of term loan (25,000) (47,000)
Repurchases of senior notes (37,539) 0
Repayments of notes payable (464) (2,815)
Principal payments under finance leases (266) (5,924)
Payment for debt extinguishment and modification costs (12) 0
Tax withholding on share-based payments (10,569) (3,561)
Proceeds from issuance of common stock, net of costs 4 7
Proceeds from exercise of stock options 0 98
Repurchases of common stock (37,670) 0
Net cash used in financing activities (111,516) (59,195)
Cash and cash equivalents    
Change in cash and cash equivalents (41,377) 48,964
Balance, beginning of period 220,540 103,558
Balance, end of period 179,163 152,522
Supplemental cash flow disclosures    
Cash paid for interest 27,418 29,533
Cash paid for income taxes 6,084 0
Non-cash investing and financing activities    
Payables incurred for capital expenditures 2,372 643
Loss on debt extinguishment 1,254 0
Operating lease right-of-use assets obtained in exchange for lease obligations $ 6,750 $ 36,059