Amounts of Unrealized and Realized Net Gains and Changes in Fair Value of Derivative Positions (Detail) (Foreign currency exchange forwards, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]
Amount of Realized Net Gains (Losses) and Changes in the Fair Value of Forward Contracts	$ 48	$ 804	$ 2,060
Interest and Other, net
Derivative [Line Items]
Amount of Realized Net Gains (Losses) and Changes in the Fair Value of Forward Contracts	48	644	2,060
Discontinued Operations
Derivative [Line Items]
Amount of Realized Net Gains (Losses) and Changes in the Fair Value of Forward Contracts		$ 160