Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 105,885	$ 88,796
Accounts receivable, net of allowance of $2,355 and $2,250, respectively	67,867	59,472
Unbilled revenues	44,342	24,475
Prepaid and other current assets	13,270	6,436
Time deposits	1,545
Restricted cash, current	948
Deferred tax assets, current	3,815	4,384
Total current assets	237,672	183,563
Property and equipment, net	52,948	35,482
Restricted cash, long-term	674	2,582
Intangible assets, net	6,014	1,251
Goodwill	11,305	8,169
Deferred tax assets, long-term	3,529	1,875
Other long-term assets	578	2,691
Total assets	312,720	235,613
Current liabilities
Accounts payable	2,558	2,714
Accrued expenses	13,485	24,782
Deferred revenue	3,847	6,949
Due to employees	12,137	8,234
Taxes payable	12,802	8,712
Deferred tax liabilities, current	1,243	1,736
Total current liabilities	46,072	53,127
Taxes payable, long-term	1,228	1,204
Deferred tax liabilities, long-term	269	283
Total liabilities	47,569	54,614
Commitments and contingencies (Note 9)
Stockholders' equity
Common stock, $.001 par value; 160,000,000 authorized; 44,677,738 and 18,914,616 shares issued, 43,395,364 and 17,158,904 shares outstanding at September 30, 2012 and December 31, 2011, respectively	43	17
Preferred stock, $.001 par value; 0 and 290,277 authorized Series A-3 convertible preferred stock issued and outstanding at September 30, 2012 and December 31, 2011, respectively
Additional paid-in capital	164,443	40,020
Retained earnings	113,993	74,508
Treasury stock	(11,666)	(15,972)
Accumulated other comprehensive loss	(1,662)	(3,514)
Total stockholders' equity	265,151	95,059
Total liabilities and stockholders' equity	312,720	235,613
Convertible Redeemable Preferred Stock
Current liabilities
Preferred stock, $.001 par value; 0 and 5,000,000 authorized at September 30, 2012 and December 31, 2011; 0 and 2,054,935 Series A-1 convertible redeemable preferred stock issued and outstanding at September 30, 2012 and December 31, 2011; $.001 par value 0 and 945,114 authorized at September 30, 2012 and December 31, 2011, 0 and 384,804 Series A-2 convertible redeemable preferred stock issued and outstanding at September 30, 2012 and December 31, 2011		$ 85,940