CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 175,075	$ 169,207
Accounts receivable, net of allowance of $2,267 and $1,800, respectively	108,179	95,431
Unbilled revenues	67,880	43,108
Prepaid and other current assets	16,200	14,355
Employee loans, net of allowance of $0 and $0, respectively, current	2,240	1,989
Time deposits	1,142	1,188
Restricted cash, current	0	298
Deferred tax assets, current	4,123	5,392
Total current assets	374,839	330,968
Property and equipment, net	54,523	53,315
Restricted cash, long-term	212	225
Employee loans, net of allowance of $0 and $0, respectively, long-term	4,218	4,401
Intangible assets, net	49,381	13,734
Goodwill	42,547	22,268
Deferred tax assets, long-term	9,382	4,557
Other long-term assets	2,862	3,409
Total assets	537,964	432,877
Current liabilities
Accounts payable	12,500	2,835
Accrued expenses and other liabilities	23,280	20,175
Deferred revenue, current	4,244	4,543
Due to employees	21,006	12,665
Taxes payable	15,050	14,171
Deferred tax liabilities, current	1,563	275
Total current liabilities	77,643	54,664
Other long-term liabilities (Note 2 and 4)	31,892	0
Deferred revenue, long-term	228	533
Taxes payable, long-term	1,228	1,228
Deferred tax liabilities, long-term	326	351
Total liabilities	111,317	56,776
Commitments and contingencies (Note 11)
Stockholders’ equity
Common stock, $0.001 par value; 160,000,000 authorized; 48,229,347 and 47,569,463 shares issued, 47,514,892 and 46,614,916 shares outstanding at June 30, 2014 and December 31, 2013, respectively	48	46
Additional paid-in capital	212,450	195,585
Retained earnings	223,164	190,986
Treasury stock	(6,500)	(8,684)
Accumulated other comprehensive loss	(2,515)	(1,832)
Total stockholders’ equity	426,647	376,101
Total liabilities and stockholders’ equity	$ 537,964	$ 432,877