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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Net loss $ (23,360) $ (20,145) $ (131,891)
Adjustments to reconcile net loss to net cash provided by operating activities:      
Depreciation and amortization expense 172,260 139,767 123,866
Equity in income of joint ventures (12,853) (15,731) (16,747)
Stock-based compensation expense 19,574 18,486 54,162
Changes in fair value of investments 0 1,199 (511)
Elimination of unrealized profit on sales to joint ventures 4,159 0 174
Debt issuance expense 0 0 5,166
Gain on disposal of assets 0 0 (1,000)
Deferred taxes (10,478) (1,326) (737)
Unrealized foreign exchange losses 5,658 6,116 1,407
Changes in fair value of contingent consideration 576 0 0
Changes in assets and liabilities:      
Accounts receivable, net (34,895) (97,758) (20,256)
Inventories 10,575 (26,037) 906
Other assets (16,745) 4,365 12,683
Accounts payable and accrued liabilities 34,600 35,491 5,371
Other liabilities (18,275) 31,435 (5,981)
Income taxes, net 8,798 10,209 (2,056)
Dividends received from joint ventures 8,329 7,283 4,058
Other (9,614) (13,185) (12,470)
Net cash provided by operating activities 138,309 80,169 16,144
Cash flows from investing activities:      
Capital expenditures (122,110) (81,904) (81,511)
Cash and cash equivalents and restricted cash acquired in the Merger 0 0 189,739
Payment for acquired businesses, net of cash acquired (28,707) 0 0
Acquisition of technology 0 (7,967) 0
Proceeds from disposal of assets 2,013 7,279 3,818
Proceeds from sale / maturity of investments 572 11,386 0
Net cash (used in) provided by investing activities (148,232) (71,206) 112,046
Cash flows from financing activities:      
(Cash pledged for) release of collateral deposits (217) (70) 162
Payments of loan issuance and other transaction costs 0 (132) (5,123)
Proceeds from long-term borrowings 50,000 0 0
Repayment of long-term borrowings (65,096) 0 0
Repurchase of common stock (20,024) (12,996) 0
Payment of withholding taxes on stock-based compensation plans (2,559) (4,168) (818)
Repayment of financed insurance premium (9,317) (7,245) (227)
Repayments of finance leases (2,126) (1,001) (1,170)
Net cash used in financing activities (49,339) (25,612) (7,176)
Effect of exchange rate changes on cash and cash equivalents (6,032) (4,738) (1,876)
Net (decrease) increase to cash and cash equivalents and restricted cash (65,294) (21,387) 119,138
Cash and cash equivalents and restricted cash at beginning of year 218,460 239,847 120,709
Cash and cash equivalents and restricted cash at end of year $ 153,166 $ 218,460 $ 239,847