Schedule Of Funded Status Of Gratuity Plan (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 3,824	$ 2,898
Projected benefit obligation at beginning of the year	5,642	5,330
Service cost	1,671	1,660
Interest Cost	644	560
Plan Amendment
Actuarial loss/(gain)	1,029	(401)
Acquisition/Divestiture	(4)
Benefits paid	(562)	(538)
Effect of exchange rate changes	(203)	(969)
Projected benefit obligation at end of the year	8,217	5,642
Provision for gratuity (included in total current liabilities)	433	610
Provision for gratuity (included in non-current liabilities)	5,252	5,032
Defined Benefit Pension Plan, Liabilities	5,685	5,642
Net Actuarial (Gain)/ Loss	779	(253)
Net Prior Service (Credit)/Cost	262	302
Total accumulated other comprehensive (income)/loss	$ 1,041	$ 49