CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 582,585	$ 362,025
Accounts receivable, net of allowance of $1,186 and $1,434, respectively	265,639	199,982
Unbilled revenues	86,500	63,325
Prepaid and other current assets, net of allowance of $45 and $644, respectively	23,196	18,493
Employee loans, current, net of allowance of $0 and $0, respectively	2,113	2,726
Total current assets	960,033	646,551
Property and equipment, net	86,419	73,616
Employee loans, noncurrent, net of allowance of $0 and $0, respectively	2,097	3,252
Intangible assets, net	44,511	51,260
Goodwill	119,531	109,289
Deferred tax assets	24,974	31,005
Other noncurrent assets, net of allowance of $140 and $132, respectively	12,691	10,838
Total assets	1,250,256	925,811
Current liabilities
Accounts payable	5,574	3,213
Accrued expenses and other current liabilities	89,812	49,895
Due to employees	38,757	32,203
Deferred compensation due to employees	5,964	5,900
Taxes payable, current	40,860	25,008
Total current liabilities	180,967	116,219
Long-term debt	25,033	25,048
Taxes payable, noncurrent	59,874	0
Other noncurrent liabilities	9,435	3,132
Total liabilities	275,309	144,399
Commitments and contingencies (Note 15)
Stockholders’ equity
Common stock, $0.001 par value; 160,000,000 authorized; 53,003,420 and 51,117,422 shares issued, 52,983,685 and 51,097,687 shares outstanding at December 31, 2017 and December 31, 2016, respectively	53	50
Additional paid-in capital	473,874	374,907
Retained earnings	518,820	444,320
Treasury stock	(177)	(177)
Accumulated other comprehensive loss	(17,623)	(37,688)
Total stockholders’ equity	974,947	781,412
Total liabilities and stockholders’ equity	$ 1,250,256	$ 925,811