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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities      
Net income $ 206.3 $ 4.6 $ 16.8
Adjustments to reconcile net income to net cash provided by (used in) operating activities:      
Depreciation and amortization 72.8 63.2 57.4
Stock-based compensation expense 48.3 40.9 34.4
Non-cash interest expense 6.7 5.8 40.2
Loss on extinguishment of convertible debt 0.0 0.0 42.4
Provision for credit losses 2.3 4.2 3.1
Other (0.1) 2.8 1.2
Changes in operating assets and liabilities:      
Accounts receivable (99.4) (12.9) (45.5)
Accounts receivable — related party (54.8) (38.9) (25.8)
Inventories (53.6) (49.1) (154.4)
Prepaid expenses and other assets (42.1) (36.8) (46.7)
Accounts payable (11.0) (2.4) (15.6)
Net cash provided by (used in) operating activities 145.7 119.0 (68.1)
Cash flows from investing activities      
Capital expenditures (75.6) (122.9) (111.9)
Investments in developed software (8.5) (12.9) (10.8)
Acquisition of other intangible assets (25.1) (21.5) 0.0
Acquisition of a business (3.0) (26.0) 0.0
Cash paid for investments (7.2) (7.8) 0.0
Receipts from the maturity or sale of marketable securities 0.0 0.0 40.0
Net cash used in investing activities (119.4) (191.1) (82.7)
Cash flows from financing activities      
Repayment of convertible debt 0.0 0.0 (460.9)
Proceeds from issuance of term loan, net of issuance costs 0.0 0.0 489.5
Repayment of term loan (5.0) (5.0) (2.5)
Proceeds from equipment financings, net 0.0 0.0 43.1
Repayment of equipment financings (19.8) (17.4) (17.8)
Repayment of mortgage (2.2) (2.1) (2.0)
Payment of debt issuance costs (0.3) 0.0 (4.0)
Prepayments of financing lease obligation 0.0 (15.3) 0.0
Proceeds from exercise of stock options 16.3 6.9 15.4
Proceeds from issuance of common stock under employee stock purchase plan 10.6 9.4 8.1
Payment of withholding taxes in connection with vesting of restricted stock units (13.2) (16.8) (28.2)
Net cash (used in) provided by financing activities (13.6) (40.3) 40.7
Effect of exchange rate changes on cash 1.8 (4.3) (5.5)
Net increase (decrease) in cash, cash equivalents, and restricted cash 14.5 (116.7) (115.6)
Cash, cash equivalents, and restricted cash, beginning of year 689.7 806.4 922.0
Cash, cash equivalents, and restricted cash, end of year (Note 6) 704.2 689.7 806.4
Nonrelated Party      
Changes in operating assets and liabilities:      
Accrued expenses and other liabilities 73.8 133.9 22.7
Related Party      
Changes in operating assets and liabilities:      
Accrued expenses and other liabilities $ (3.5) $ 3.7 $ 1.7