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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 201,592 $ 199,612
Adjustments to reconcile net income to net cash provided by operating activities:    
Deferred taxes 9,506 (36,688)
Depreciation and amortization 69,112 71,639
Stock-based compensation 85,816 75,595
Non-cash operating lease cost 19,040 15,531
Other non-cash operating activities 2,377 21,860
Changes in assets and liabilities, net of effects of acquisitions:    
Accounts receivable (146,932) (73,680)
Inventories 31,396 19,064
Prepaid expenses and other assets (80,904) (16,799)
Accounts payable (6,398) (10,351)
Accrued and other long-term liabilities 44,779 140,284
Long-term income tax payable (12,961) (11,113)
Deferred revenues (27,932) 56,718
Net cash provided by operating activities 188,491 451,672
CASH FLOWS FROM INVESTING ACTIVITIES:    
Acquisitions, net of cash acquired (77,075) 0
Purchase of property, plant and equipment (62,819) (122,664)
Purchase of marketable securities 0 (2,373)
Proceeds from maturities of marketable securities 15,560 17,601
Proceeds from sales of marketable securities 7,518 4,048
Purchase of equity investments (75,390) (75,000)
Other investing activities 129 74
Net cash used in investing activities (192,077) (178,314)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from issuance of common stock 14,339 14,256
Common stock repurchases (150,012) (292,360)
Activity for equity forward contracts related to accelerated stock repurchase agreements, net 0 40,000
Payroll taxes paid upon the vesting of equity awards (27,602) (21,788)
Net cash used in financing activities (163,275) (259,892)
Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash (9,196) (3,523)
Net (decrease) increase in cash, cash equivalents, and restricted cash (176,057) 9,943
Cash, cash equivalents, and restricted cash at beginning of the period 938,519 942,355
Cash, cash equivalents, and restricted cash at end of the period $ 762,462 $ 952,298