CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 443,501	$ 362,025
Restricted cash	2,638	2,400
Time deposits	403	403
Accounts receivable, net of allowance of $1,419 and $1,434, respectively	208,273	199,982
Unbilled revenues	107,858	63,325
Prepaid and other current assets, net of allowance of $292 and $644, respectively	23,275	15,690
Employee loans, net of allowance of $0 and $0, respectively	2,533	2,726
Total current assets	788,481	646,551
Property and equipment, net	77,115	73,616
Restricted cash	277	239
Employee loans, net of allowance of $0 and $0, respectively	2,705	3,252
Intangible assets, net	49,998	51,260
Goodwill	116,239	109,289
Deferred tax assets	33,022	31,005
Other long-term assets, net of allowance of $138 and $132, respectively	11,546	10,599
Total assets	1,079,383	925,811
Current liabilities
Accounts payable	4,253	3,213
Accrued expenses and other liabilities	47,822	49,895
Due to employees	41,312	32,203
Deferred compensation due to employees	1,172	5,900
Taxes payable	35,661	25,008
Total current liabilities	130,220	116,219
Long-term debt	25,033	25,048
Other long-term liabilities	4,424	3,132
Total liabilities	159,677	144,399
Commitments and contingencies (Note 8)
Stockholders’ equity
Common stock, $0.001 par value; 160,000,000 authorized; 52,476,671 and 51,117,422 shares issued, 52,456,936 and 51,097,687 shares outstanding at June 30, 2017 and December 31, 2016, respectively	51	50
Additional paid-in capital	439,523	374,907
Retained earnings	507,060	444,320
Treasury stock	(177)	(177)
Accumulated other comprehensive loss	(26,751)	(37,688)
Total stockholders’ equity	919,706	781,412
Total liabilities and stockholders’ equity	$ 1,079,383	$ 925,811

The aggregate of amounts due from customers or clients, within one year of the balance sheet date (or one operating cycle, if longer), for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date within one year of the balance sheet, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively.

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- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).