CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 512,493	$ 362,025
Restricted cash	0	2,400
Time deposits	803	403
Accounts receivable, net of allowance of $1,460 and $1,434, respectively	230,119	199,982
Unbilled revenues	106,377	63,325
Prepaid and other current assets, net of allowance of $123 and $644, respectively	31,557	15,690
Employee loans, net of allowance of $0 and $0, respectively	2,393	2,726
Total current assets	883,742	646,551
Property and equipment, net	77,935	73,616
Restricted cash	278	239
Employee loans, net of allowance of $0 and $0, respectively	2,462	3,252
Intangible assets, net	46,238	51,260
Goodwill	119,452	109,289
Deferred tax assets	30,300	31,005
Other long-term assets, net of allowance of $136 and $132, respectively	12,599	10,599
Total assets	1,173,006	925,811
Current liabilities
Accounts payable	5,592	3,213
Accrued expenses and other liabilities	71,842	49,895
Due to employees	42,920	32,203
Deferred compensation due to employees	2,890	5,900
Taxes payable	35,740	25,008
Total current liabilities	158,984	116,219
Long-term debt	25,041	25,048
Other long-term liabilities	3,836	3,132
Total liabilities	187,861	144,399
Commitments and contingencies (Note 8)
Stockholders’ equity
Common stock, $0.001 par value; 160,000,000 authorized; 52,748,006 and 51,117,422 shares issued, 52,728,271 and 51,097,687 shares outstanding at September 30, 2017 and December 31, 2016, respectively	52	50
Additional paid-in capital	456,624	374,907
Retained earnings	549,694	444,320
Treasury stock	(177)	(177)
Accumulated other comprehensive loss	(21,048)	(37,688)
Total stockholders’ equity	985,145	781,412
Total liabilities and stockholders’ equity	$ 1,173,006	$ 925,811