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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 548,055 $ 485,928
Accounts receivable and unbilled receivables, net of allowances of $5,518 and $4,286, respectively 205,658 190,117
Inventories 96,208 96,298
Prepaid expenses 17,122 16,027
Other current assets 36,956 41,044
Total current assets 903,999 829,414
Property and equipment, net 60,538 59,073
Long-term investment in sales-type leases, net 21,255 22,156
Operating lease right-of-use assets 51,922 55,114
Goodwill 499,065 499,309
Intangible assets, net 161,816 168,211
Long-term deferred tax assets 15,376 15,019
Prepaid commissions 54,209 56,919
Other long-term assets 118,443 119,289
Total assets 1,886,623 1,824,504
Current liabilities:    
Accounts payable 50,759 40,309
Accrued compensation 37,851 55,750
Accrued liabilities 84,075 80,311
Deferred revenues, net 119,588 100,053
Total current liabilities 292,273 276,423
Long-term deferred revenues 7,887 5,673
Long-term deferred tax liabilities 39,128 39,633
Long-term operating lease liabilities 45,435 48,897
Other long-term liabilities 18,542 19,174
Convertible senior notes, net 472,347 467,201
Total liabilities 875,612 857,001
Commitments and contingencies (Note 13)
Stockholders’ equity:    
Preferred stock, $0.001 par value, 5,000 shares authorized; no shares issued 0 0
Common stock, $0.001 par value, 100,000 shares authorized; 53,065 and 52,677 shares issued; 43,171 and 42,783 shares outstanding, respectively 53 53
Treasury stock at cost, 9,894 outstanding, respectively (238,109) (238,109)
Additional paid-in capital 950,361 920,359
Retained earnings 304,849 290,722
Accumulated other comprehensive loss (6,143) (5,522)
Total stockholders’ equity 1,011,011 967,503
Total liabilities and stockholders’ equity $ 1,886,623 $ 1,824,504