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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Cash flows from operating activities    
Net income (loss) $ 10,620 $ (32,620)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 27,186 31,156
Change in non-cash lease expense 439 161
Share-based compensation 2,669 2,153
Amortization of debt issuance costs and discounts on debt 1,155 1,113
Loss on disposal of assets 209 589
(Benefit) provision for credit losses (27) 160
Deferred income taxes (297) 423
Impairment of goodwill and intangible assets 0 6,461
Change in fair value of derivative 0 1
Changes in operating assets and liabilities:    
Accounts receivable (1,352) 4,108
Prepaid expenses, inventories and other current assets (6,012) 72
Other assets 9,472 (586)
Accounts payable and other accrued expenses 17,791 (492)
Other liabilities (9,659) (1,542)
Net cash provided by operating activities 52,194 11,157
Cash flows from investing activities    
Purchase of property and equipment, net of change in construction payables (4,873) (18,541)
Proceeds from disposal of property and equipment 223 353
Net cash used in investing activities (4,650) (18,188)
Cash flows from financing activities    
Borrowings under revolving credit facility 0 200,000
Repayments of notes payable (1,483) (1,824)
Principal payments under finance leases (839) (629)
Tax withholding on share-based payments (3,439) (428)
Proceeds from issuance of common stock, net of costs 3 2
Proceeds from exercise of stock options 98 0
Net cash (used in) provided by financing activities (5,660) 197,121
Cash and cash equivalents    
Change in cash and cash equivalents 41,884 190,090
Balance, beginning of period 103,558 111,678
Balance, end of period 145,442 301,768
Supplemental cash flow disclosures    
Cash paid for interest 7,630 9,616
Non-cash investing and financing activities    
Payables incurred for capital expenditures 561 2,292
Operating lease right-of-use assets obtained in exchange for lease obligations $ 28,681 $ 1,739