CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 280,724	$ 199,449
Time deposits	0	30,181
Accounts receivable, net of allowance of $2,997 and $1,729, respectively	178,796	174,617
Unbilled revenues	96,045	95,808
Prepaid and other current assets	15,273	14,344
Employee loans, net of allowance of $0 and $0, respectively	2,684	2,689
Deferred tax assets	0	11,847
Total current assets	573,522	528,935
Property and equipment, net	66,751	60,499
Restricted cash	246	238
Employee loans, net of allowance of $0 and $0, respectively	3,478	3,649
Intangible assets, net	55,962	46,860
Goodwill	110,668	115,930
Deferred tax assets	25,991	18,312
Other long-term assets	7,270	4,113
Total assets	843,888	778,536
Current liabilities
Accounts payable	3,005	2,576
Accrued expenses and other liabilities	29,557	60,749
Deferred revenue	3,356	3,047
Due to employees	33,421	26,703
Deferred compensation due to employees	910	5,364
Taxes payable	21,765	29,472
Total current liabilities	92,014	127,911
Long-term debt	40,088	35,000
Deferred tax liabilities	2,819	2,402
Total liabilities	134,921	165,313
Commitments and contingencies (Note 9)
Stockholders’ equity
Common stock, $0.001 par value; 160,000,000 authorized; 50,884,007 and 50,177,044 shares issued, 50,866,612 and 50,166,537 shares outstanding at June 30, 2016 and December 31, 2015, respectively	50	49
Additional paid-in capital	348,527	303,363
Retained earnings	393,383	345,054
Treasury stock	(156)	(93)
Accumulated other comprehensive loss	(32,837)	(35,150)
Total stockholders’ equity	708,967	613,223
Total liabilities and stockholders’ equity	$ 843,888	$ 778,536