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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Operating activities:    
Net (loss) income $ (115,601) $ 17,085
Adjustments to reconcile net (loss) income to net cash provided by operating activities:    
Goodwill impairment 163,243 0
Deferred taxes 17,113 9,014
Depreciation of fixed assets and amortization of intangible assets 57,542 57,089
Amortization of debt issuance costs 2,284 2,311
Amortization of debt discount 70 728
(Gain) loss on early extinguishment of debt (7,518) 16,926
Stock-based compensation 38,905 35,475
Changes in contingent consideration (5,541) (3,847)
Other net (gains) losses (53) 2,415
Changes in operating assets and liabilities:    
Accounts receivable, net 4,903 1,440
Inventories, net (7,512) (457)
Prepaid expenses and other assets (6,338) (6,986)
Accounts payable 3,409 1,988
Accrued expenses and income taxes payable 12,546 (26,156)
Other liabilities (1,195) 40
Net cash provided by operating activities 156,257 107,065
Investing activities:    
Purchases of fixed assets (8,518) (13,363)
Purchases of available-for-sale investments (207,017) (111,682)
Sales of available-for-sale investments 132,627 200,970
Purchases of debt investments 0 (6,758)
Net cash (used in) provided by investing activities (82,908) 69,167
Financing activities:    
Proceeds from exercises of stock options 0 1,939
Proceeds from shares issued under employee stock purchase plan 1,364 1,672
Payment of employee withholding taxes on restricted stock unit vests (414) 0
Purchase of treasury stock (25,000) 0
Proceeds from 2029 convertible senior notes 287,500 0
Proceeds from Term loan A facility 0 149,550
Purchase of capped call transactions (26,709) 0
Debt extinguishment costs 0 (5,750)
Payment of debt issuance and financing costs (9,350) (1,163)
Net cash provided by (used in) financing activities 19,318 (181,252)
Net increase (decrease) in cash and cash equivalents 92,667 (5,020)
Cash and cash equivalents, beginning of period 153,298 104,139
Cash and cash equivalents, end of period 245,965 99,119
Supplemental cash flow information:    
Cash paid for interest 10,191 24,931
Net cash paid for income taxes 9,575 2,072
Non-cash investing and financing activities:    
Fixed assets included in accounts payable and accrued liabilities 415 1,470
Excise tax on share repurchases included in accrued liabilities 121 0
3.375% Convertible senior notes due May 2024    
Financing activities:    
Repayment of convertible senior notes (8,641) 0
0.750% Convertible senior notes due August 2025    
Financing activities:    
Repayment of convertible senior notes (190,994) 0
Term Loan B Facility    
Financing activities:    
Repayment of Term loan facility 0 (296,875)
Term Loan A Facility    
Financing activities:    
Repayment of Term loan facility $ (8,438) $ (30,625)