UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 281,218	$ 68,363
Marketable securities	186,810	0
Total cash, cash equivalents, and marketable securities	468,028	68,363
Accounts receivable	137,953	199,720
Unbilled receivables	208,823	180,219
Other current assets	89,406	57,308
Total current assets	904,210	505,610
Unbilled receivables	108,456	121,736
Goodwill	78,864	79,039
Other long-term assets	395,797	278,427
Total assets	1,487,327	984,812
Current liabilities:
Accounts payable	20,443	17,475
Accrued expenses	43,447	48,001
Accrued compensation and related expenses	90,836	104,126
Deferred revenue	181,680	190,080
Other current liabilities	19,916	18,273
Total current liabilities	356,322	377,955
Convertible senior notes, net	513,794	0
Operating lease liabilities	62,544	52,610
Other long-term liabilities	25,345	15,237
Total liabilities	958,005	445,802
Stockholders’ equity:
Preferred stock, 1,000 shares authorized; none issued	0	0
Common stock, 200,000 shares authorized; 80,697 and 79,599 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively	807	796
Additional paid-in capital	201,882	140,523
Retained earnings	338,300	410,919
Accumulated other comprehensive (loss)	(11,667)	(13,228)
Total stockholders’ equity	529,322	539,010
Total liabilities and stockholders’ equity	$ 1,487,327	$ 984,812