Derivatives and Hedging (Detail) - Derivative Gains And Losses That Have Been Recognized In Condensed Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Total expense, net	$ 2,393	$ 1,022	$ 6,168	$ 2,949
Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Total expense, net	2,762	1,034	6,094	3,059
Other expense (income), net
Derivative Instruments, Gain (Loss) [Line Items]
Total expense, net	$ (369)	$ (12)	$ 74	$ (110)