Prepaid Expenses and Other Current Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Prepaid Expenses And Other Current Assets [Line Items]
Advance taxes	$ 65,053	$ 71,076
Deferred transition costs	37,050	38,336
Derivative instruments	6,098	8,714
Employee advances	5,397	4,800
Advances to suppliers	1,994	2,912
Prepaid expenses	12,569	12,944
Deposits	3,896	2,701
Others	7,056	9,286
Prepaid expenses and other current assets, net	$ 139,113	$ 150,769