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Condensed Consolidated Balance Sheets - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 311.1 $ 187.1
Debt securities available-for-sale, at fair value (amortized cost $454.6 million at September 30, 2021 and $612.4 million at December 31, 2020) 454.8 613.9
Accounts receivable 163.8 157.1
Inventories 25.5 28.0
Other current assets 50.5 30.1
Total current assets 1,005.7 1,016.2
Deferred tax assets 310.4 319.4
Debt securities available-for-sale, at fair value (amortized cost $513.8 million at September 30, 2021 and $226.7 million at December 31, 2020) 513.7 227.1
Right-of-use assets 97.9 82.8
Equity securities 35.3 38.2
Property and equipment, net 51.1 44.6
Other assets 3.2 6.4
Total assets 2,017.3 1,734.7
Current liabilities:    
Accounts payable and accrued liabilities 205.9 168.7
Other current liabilities 20.0 17.8
Total current liabilities 225.9 186.5
Convertible senior notes 330.7 317.9
Operating lease liabilities 106.4 94.4
Other long-term liabilities 8.3 9.7
Total liabilities 671.3 608.5
Stockholders’ equity:    
Preferred stock, $0.001 par value; 5.0 shares authorized; no shares issued and outstanding at September 30, 2021 and December 31, 2020 0.0 0.0
Common stock, $0.001 par value; 220.0 shares authorized; issued and outstanding shares were 94.8 at September 30, 2021 and 93.5 at December 31, 2020 0.1 0.1
Additional paid-in capital 1,974.0 1,849.7
Accumulated other comprehensive income 0.4 1.8
Accumulated deficit (628.5) (725.4)
Total stockholders’ equity 1,346.0 1,126.2
Total liabilities and stockholders’ equity $ 2,017.3 $ 1,734.7