CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 191,246	$ 169,207
Accounts receivable, net of allowance of $2,385 and $1,800, respectively	113,940	95,431
Unbilled revenues	70,926	43,108
Prepaid and other current assets	18,188	14,355
Employee loans, net of allowance of $0 and $0, respectively, current	2,349	1,989
Time deposits	1,061	1,188
Restricted cash, current	0	298
Deferred tax assets, current	4,230	5,392
Total current assets	401,940	330,968
Property and equipment, net	54,665	53,315
Restricted cash, long-term	208	225
Employee loans, net of allowance of $0 and $0, respectively, long-term	4,207	4,401
Intangible assets, net	46,280	13,734
Goodwill	39,055	22,268
Deferred tax assets, long-term	14,929	4,557
Other long-term assets	3,747	3,409
Total assets	565,031	432,877
Current liabilities
Accounts payable	6,027	2,835
Accrued expenses and other liabilities	31,665	20,175
Deferred revenue, current	2,282	4,543
Due to employees	22,371	12,665
Taxes payable	20,317	14,171
Deferred tax liabilities, current	1,406	275
Total current liabilities	84,068	54,664
Other long-term liabilities (Note 2 and 4)	31,672	0
Deferred revenue, long-term	113	533
Taxes payable, long-term	0	1,228
Deferred tax liabilities, long-term	3,478	351
Total liabilities	119,331	56,776
Commitments and contingencies (Note 11)
Stockholders’ equity
Common stock, $0.001 par value; 160,000,000 authorized; 48,405,957 and 47,569,463 shares issued, 47,691,502 and 46,614,916 shares outstanding at September 30, 2014 and December 31, 2013, respectively	48	46
Additional paid-in capital	220,722	195,585
Retained earnings	242,204	190,986
Treasury stock	(6,500)	(8,684)
Accumulated other comprehensive loss	(10,774)	(1,832)
Total stockholders’ equity	445,700	376,101
Total liabilities and stockholders’ equity	$ 565,031	$ 432,877