UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 538,142	$ 68,363
Accounts receivable	191,533	199,720
Unbilled receivables	182,399	180,219
Other current assets	72,000	57,308
Total current assets	984,074	505,610
Unbilled receivables	110,393	121,736
Goodwill	78,498	79,039
Other long-term assets	301,428	278,427
Total assets	1,474,393	984,812
Current liabilities:
Accounts payable	27,770	17,475
Accrued expenses	36,985	48,001
Accrued compensation and related expenses	59,928	104,126
Deferred revenue	197,018	190,080
Other current liabilities	17,790	18,273
Total current liabilities	339,491	377,955
Convertible senior notes, net	505,108	0
Operating lease liabilities	47,919	52,610
Other long-term liabilities	15,264	15,237
Total liabilities	907,782	445,802
Stockholders’ equity:
Preferred stock,1,000 shares authorized; none issued	0	0
Common stock, 200,000 shares authorized; 80,076 and 79,599 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	801	796
Additional paid-in capital	196,310	140,523
Retained earnings	383,142	410,919
Accumulated other comprehensive (loss)	(13,642)	(13,228)
Total stockholders’ equity	566,611	539,010
Total liabilities and stockholders’ equity	$ 1,474,393	$ 984,812