CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 456,727	$ 109,924
Restricted cash	1,089	862
Short-term investments	108,919	466,186
Accounts receivable, net	163,516	171,359
Prepaid expenses and other current assets	23,195	30,068
Total current assets	753,446	778,399
Property and equipment, net	50,154	51,919
Right-of-use assets	85,538	0
Deposits and other assets	8,024	8,134
Deferred tax assets, net	19,409	17,316
Total assets	916,571	855,768
Current liabilities:
Accounts payable, accrued expenses, and operating lease liabilities	33,919	33,684
Accrued compensation and employee benefits	48,792	48,045
Deferred revenue and advance payments	187,107	176,540
Total current liabilities	269,818	258,269
Deferred revenue and advance payments	4,344	6,469
Operating lease liabilities	103,424	0
Other long-term liabilities	30,400	61,262
Deferred tax liabilities	26	37
Total liabilities	408,012	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	593,583	576,957
Treasury stock, at cost; 7,807 shares and 7,285 shares, respectively	(658,880)	(586,161)
Accumulated other comprehensive loss	(9,651)	(10,217)
Retained earnings	583,489	549,134
Total stockholders’ equity	508,559	529,731
Total liabilities and stockholders’ equity	916,571	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