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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Cash Flows From Operating Activities:    
Net income (loss) $ 43,541 $ 6,889
Reconciliation to net cash provided by operating activities:    
Loss (gain) on impairment and disposal of assets 338 161
Gain on deconsolidation of subsidiary (13,587)  
Depreciation of property, plant, and equipment 16,800 14,946
Amortization of product rights, trademarks, and patents 930 771
Operating lease right-of-use asset amortization 2,471 2,693
Share-based compensation 14,837 16,165
Changes in deferred taxes, net 5,170 3,638
Changes in operating assets and liabilities:    
Accounts receivable, net (14,166) (6,706)
Inventories (5,768) 2,351
Prepaid expenses and other assets 2,463 (3,755)
Income tax refunds, deposits, and payables, net 2,832 (1,973)
Operating lease liabilities (2,529) (2,478)
Accounts payable and accrued liabilities 4,221 7,671
Net cash provided by operating activities 57,553 40,373
Cash Flows From Investing Activities:    
Purchases and construction of property, plant, and equipment (20,578) (24,526)
Purchase of short-term investments (12,459) (10,930)
Maturity of short-term investments 17,423 11,891
Payment of deposits and other assets (1,104) (674)
Net cash used in investing activities (16,718) (24,239)
Cash Flows From Financing Activities:    
Acquisition of additional ownership interest in ANP   (106)
ANP restructuring (see Note 3) (53,592)  
Proceeds from equity plans, net of withholding tax payments 10,264 21,312
Purchase of treasury stock (15,437) (21,035)
Settlement of ANP equity awards (839)  
Debt issuance costs (1,430)  
Proceeds from borrowing under lines of credit   1,072
Repayments under lines of credit (1,161)  
Proceeds from issuance of long-term debt 70,000 3,067
Principal payments on long-term debt (36,127) (6,329)
Net cash provided by (used in) financing activities (28,322) (2,019)
Effect of exchange rate changes on cash (175) 110
Net increase (decrease) in cash, cash equivalents and restricted cash 12,338 14,225
Cash, cash equivalents, and restricted cash at beginning of period 94,507 75,550
Cash, cash equivalents, and restricted cash at end of period 106,845 89,775
Noncash Investing and Financing Activities:    
Capital expenditure included in accounts payable 6,246 6,477
Operating lease right-of-use assets 11,015 4,119
Equipment acquired under finance leases 107 61
Supplemental Disclosures of Cash Flow Information:    
Interest paid, net of capitalized interest 1,868 1,678
Income taxes paid $ 5,480 $ 2,807