Impact of Tax Correction to Consolidated Statement of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Net income	$ (28,904)	$ 9,088
Unrealized foreign currency gains, net	1,451	2,666
Deferred income taxes	271	(296)
Income taxes payable	(14,459)	20,188
Net cash provided by operating activities	33,037	113,850
As Adjusted
Net income		9,958	[1]
Unrealized foreign currency gains, net		(3,230)	[1]
Deferred income taxes		(82)	[1]
Income taxes payable		19,668	[1]
Net cash provided by operating activities		113,850	[1]
As Corrected
Net income		9,088
Unrealized foreign currency gains, net		(2,666)
Deferred income taxes		(296)
Income taxes payable		20,188
Net cash provided by operating activities		113,850
Increase/(Decrease)
Net income		(870)
Unrealized foreign currency gains, net		564
Deferred income taxes		(214)
Income taxes payable		$ 520

[1] Refer to the above section "Impact of Change in Consolidated Statement of Cash Flows Presentation to Prior Periods"