Segment Reporting (Schedule Of Segment-Wise Revenues And Gross Profits) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Segment Reporting Information [Line Items]
Net Revenues	$ 172,420	$ 167,627	$ 156,985	$ 145,372	$ 144,900	$ 140,545	$ 130,649	$ 116,039	$ 642,404	[1]	$ 532,133	[1]	$ 419,006	[1]
Gross Profit									246,949		212,091		203,852
Selling, general and administrative expenses	19,638	36,679	27,781	24,623	25,270	24,924	19,114	22,248	108,721		91,556		78,463
Income from operations									138,228		120,535		125,389
Applications Outsourcing [Member]
Segment Reporting Information [Line Items]
Net Revenues									478,927		402,526		305,931
Gross Profit									164,812		141,168		132,484
KPO [Member]
Segment Reporting Information [Line Items]
Net Revenues									97,777		79,589		76,558
Gross Profit									57,291		50,579		52,228
E-Business [Member]
Segment Reporting Information [Line Items]
Net Revenues									52,854		38,006		27,092
Gross Profit									19,899		14,441		14,168
TeamSourcing [Member]
Segment Reporting Information [Line Items]
Net Revenues									12,846		12,012		9,425
Gross Profit									$ 4,947		$ 5,903		$ 4,972

[1] Net revenues are attributed to regions based upon customer location.