CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 175,717	$ 220,534
Time deposits	30,000	0
Accounts receivable, net of allowance of $2,389 and $2,181, respectively	134,941	124,483
Unbilled revenues	92,266	55,851
Prepaid and other current assets	19,635	9,289
Employee loans, net of allowance of $0 and $0, respectively, current	2,576	2,434
Deferred tax assets, current	1,831	2,496
Total current assets	456,966	415,087
Property and equipment, net	58,446	55,134
Restricted cash, long-term	111	156
Employee loans, net of allowance of $0 and $0, respectively, long-term	3,814	4,081
Intangible assets, net	37,820	47,689
Goodwill	62,207	57,417
Deferred tax assets, long-term	13,568	11,094
Other long-term assets	3,561	3,368
Total assets	636,493	594,026
Current liabilities
Accounts payable	11,993	4,641
Accrued expenses and other liabilities	26,841	32,203
Deferred revenue, current	2,615	3,220
Due to employees	25,986	24,518
Taxes payable	21,505	24,704
Contingent consideration, current (Note 2 and 4)	0	35,524
Contingent liability, current (Note 9)	87	0
Deferred tax liabilities, current	974	603
Total current liabilities	90,001	125,413
Deferred tax liabilities, long-term	2,432	4,563
Total liabilities	$ 92,433	$ 129,976
Commitments and contingencies (Note 9)
Stockholders’ equity
Common stock, $0.001 par value; 160,000,000 authorized; 49,632,642 and 48,748,298 shares issued, 49,623,617 and 48,303,811 shares outstanding at June 30, 2015 and December 31, 2014, respectively	$ 49	$ 48
Additional paid-in capital	270,658	229,501
Retained earnings	294,543	260,598
Treasury stock	(80)	(4,043)
Accumulated other comprehensive loss	(21,110)	(22,054)
Total stockholders’ equity	544,060	464,050
Total liabilities and stockholders’ equity	$ 636,493	$ 594,026