Amounts of Unrealized and Realized Net losses and Changes in Fair Value of Forward Contracts (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative [Line Items]
Amount of Realized Net Gains (Losses) and Changes in the Fair Value of Forward Contracts	$ 65	$ (185)	$ 39	$ 273
Interest and Other, net
Derivative [Line Items]
Amount of Realized Net Gains (Losses) and Changes in the Fair Value of Forward Contracts	(97)	(185)	(123)	273
Discontinued Operations
Derivative [Line Items]
Amount of Realized Net Gains (Losses) and Changes in the Fair Value of Forward Contracts	$ 162		$ 162