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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Current assets:    
Cash and cash equivalents $ 261,497 $ 109,924
Restricted cash 1,039 862
Short-term investments 313,349 466,186
Accounts receivable, net 129,144 171,359
Prepaid expenses and other current assets 22,259 30,068
Total current assets 727,288 778,399
Property and equipment, net 54,285 51,919
Right-of-use assets 89,631 0
Deposits and other assets 7,981 8,134
Deferred tax assets, net 20,535 17,316
Total assets 899,720 855,768
Current liabilities:    
Accounts payable, accrued expenses, and operating lease liabilities 32,300 33,684
Accrued compensation and employee benefits 41,561 48,045
Deferred revenue and advance payments 176,786 176,540
Total current liabilities 250,647 258,269
Deferred revenue and advance payments 4,175 6,469
Operating lease liabilities 108,183 0
Other long-term liabilities 33,990 61,262
Deferred tax liabilities 36 37
Total liabilities 397,031 326,037
Commitments and Contingencies
Stockholders’ Equity    
Preferred stock undesignated, $0.001 par value; 5,000 shares authorized; no shares issued or outstanding 0 0
Additional paid-in capital 584,764 576,957
Treasury stock, at cost; 7,648 shares and 7,285 shares, respectively (634,405) (586,161)
Accumulated other comprehensive loss (9,310) (10,217)
Retained earnings 561,622 549,134
Total stockholders’ equity 502,689 529,731
Total liabilities and stockholders’ equity 899,720 855,768
Class A    
Stockholders’ Equity    
Common stock 16 16
Total stockholders’ equity 16 16
Class B Convertible    
Stockholders’ Equity    
Common stock 2 2
Total stockholders’ equity $ 2 $ 2