CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 220,534	$ 169,207
Accounts receivable, net of allowance of $2,181 and $1,800, respectively	124,483	95,431
Unbilled revenues	55,851	43,108
Prepaid and other current assets	9,289	14,355
Employee loans, net of allowance of $0 and $0, respectively, current	2,434	1,989
Time deposits	0	1,188
Restricted cash, current	0	298
Deferred tax assets, current	2,496	5,392
Total current assets	415,087	330,968
Property and equipment, net	55,134	53,315
Restricted cash, long-term	156	225
Employee loans, net of allowance of $0 and $0, respectively, long-term	4,081	4,401
Intangible assets, net	47,689	13,734
Goodwill	57,417	22,268
Deferred tax assets, long-term	11,094	4,557
Other long-term assets	3,368	3,409
Total assets	594,026	432,877
Current liabilities
Accounts payable	4,641	2,835
Accrued expenses and other liabilities	32,203	20,175
Deferred revenue, current	3,220	4,543
Due to employees	24,518	12,665
Taxes payable	24,704	14,171
Contingent consideration, current (Note 2 and 17)	35,524	0
Deferred tax liabilities, current	603	275
Total current liabilities	125,413	54,664
Deferred revenue, long-term	0	533
Taxes payable, long-term	0	1,228
Deferred tax liabilities, long-term	4,563	351
Total liabilities	129,976	56,776
Commitments and contingencies (Note 16)
Stockholders’ equity
Common stock, $0.001 par value; 160,000,000 authorized; 48,748,298 and 47,569,463 shares issued, 48,303,811 and 46,614,916 shares outstanding at December 31, 2014 and December 31, 2013, respectively	48	46
Additional paid-in capital	229,501	195,585
Retained earnings	260,598	190,986
Treasury stock	(4,043)	(8,684)
Accumulated other comprehensive loss	(22,054)	(1,832)
Total stockholders’ equity	464,050	376,101
Total liabilities and stockholders’ equity	$ 594,026	$ 432,877