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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Operating activities    
Net income $ 458,480 $ 307,079
Adjustments to reconcile net income to net cash provided by operating activities:    
Share-based compensation 34,994 31,923
Depreciation and amortization 8,085 7,610
Amortization of intangible assets 53,286 53,287
Amortization of debt discount 5,556 5,506
Accretion of premium on marketable securities, net (3,200) (8,520)
Realized loss (gain) on marketable securities 73 (7)
Loss on disposal of equipment 0 1,678
Lease payments recognized 680 863
Deferred income taxes 17,402 15,824
Changes in operating assets and liabilities    
Accounts receivable, net and other contract assets (37,580) (51,533)
Inventories (16,227) (59,655)
Prepaid expenses and other assets (61,382) (265)
Accounts payable and accrued expenses (27,638) (3,193)
Net cash provided by operating activities 432,529 300,597
Investing activities    
Purchases of marketable securities (247,355) (596,157)
Proceeds from sales and maturities of marketable securities 448,873 311,598
Purchases of property and equipment (5,543) (7,644)
Net cash provided by (used in) investing activities 195,975 (292,203)
Financing activities    
Repurchase of common stock (342,372) 0
Proceeds from issuance of common stock under equity incentive plans, net of taxes paid related to net share settlement 17,683 27,554
Net cash (used in) provided by financing activities (324,689) 27,554
Net increase in cash and cash equivalents 303,815 35,948
Cash and cash equivalents at beginning of period 115,850 118,370
Cash and cash equivalents at end of period 419,665 154,318
Supplemental disclosure of non-cash investing and financing activities    
Amounts accrued for purchases of property and equipment 818 320
Right-of-use assets obtained in exchange for lease obligation $ 425 $ 2,622