Derivative Instruments And Hedging Activities (Narrative) (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Notional value of foreign exchange contracts			$ 38.0
Net cash outflow/inflow from settlement of derivative contracts	$ (0.1)	$ 0.2
Derivatives Assets	0.3		$ 0.0
Derivatives Liabilities	0.4
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional value of foreign exchange contracts	$ 22.0