Derivative Financial Instruments (Notional Amounts Of Outstanding Forward Contracts) (Details) - Forward Contracts - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 30, 2016
Designated as Hedging Instrument [Member]
Notional amounts	$ 48,791	$ 39,059
Designated as Hedging Instrument [Member] | Euro / U.S. Dollar
Notional amounts	32,893	26,181
Designated as Hedging Instrument [Member] | Japanese Yen / U.S. Dollar
Notional amounts	13,733	8,800
Designated as Hedging Instrument [Member] | Swedish Krona / U.S. Dollar
Notional amounts	2,165	4,078
Not Designated as Hedging Instrument [Member]
Notional amounts	374,083	249,534
Not Designated as Hedging Instrument [Member] | Canadian / U.S. Dollar
Notional amounts	8,460	14,685
Not Designated as Hedging Instrument [Member] | Swiss Franc / Euro
Notional amounts	4,897	0
Not Designated as Hedging Instrument [Member] | Chinese Yuan offshore / Euro
Notional amounts	9,487	0
Not Designated as Hedging Instrument [Member] | Euro / U.S. Dollar
Notional amounts	206,717	174,120
Not Designated as Hedging Instrument [Member] | Japanese Yen / Euro
Notional amounts	36,907	32,782
Not Designated as Hedging Instrument [Member] | Israeli Shekel / U.S. Dollar
Notional amounts	5,704	7,271
Not Designated as Hedging Instrument [Member] | Japanese Yen / U.S. Dollar
Notional amounts	4,649	6,716
Not Designated as Hedging Instrument [Member] | Swedish Krona / Euro
Notional amounts	8,618	0
Not Designated as Hedging Instrument [Member] | Swedish Krona / U.S. Dollar
Notional amounts	4,644	3,852
Not Designated as Hedging Instrument [Member] | Singapore Dollar / U.S. Dollar
Notional amounts	75,429	1,448
Not Designated as Hedging Instrument [Member] | All other
Notional amounts	$ 8,571	$ 8,660