Derivative Financial Instruments (Notional Amounts Of Outstanding Forward Contracts) (Details) - Forward Contracts - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Designated as Hedging Instrument
Notional amounts	$ 67,050	$ 101,597
Designated as Hedging Instrument | Euro / U.S. Dollar
Notional amounts	44,699	64,831
Designated as Hedging Instrument | Japanese Yen / U.S. Dollar
Notional amounts	11,830	22,675
Designated as Hedging Instrument | Swedish Krona / U.S. Dollar
Notional amounts	10,521	14,091
Not Designated as Hedging Instrument
Notional amounts	368,201	318,519
Not Designated as Hedging Instrument | Australia, Dollars
Notional amounts	3,226	1,585
Not Designated as Hedging Instrument | Canadian / U.S. Dollar
Notional amounts	7,421	12,809
Not Designated as Hedging Instrument | Swiss Franc / Euro
Notional amounts	0	7,157
Not Designated as Hedging Instrument | Chinese Yuan offshore / Euro
Notional amounts	0	10,423
Not Designated as Hedging Instrument | Euro / U.S. Dollar
Notional amounts	309,733	244,000
Not Designated as Hedging Instrument | Japanese Yen / Euro
Notional amounts	0	17,694
Not Designated as Hedging Instrument | Israeli Shekel / U.S. Dollar
Notional amounts	7,677	8,820
Not Designated as Hedging Instrument | Japanese Yen / U.S. Dollar
Notional amounts	18,152	3,198
Not Designated as Hedging Instrument | Swedish Krona / U.S. Dollar
Notional amounts	8,568	4,627
Not Designated as Hedging Instrument | Danish Krona / U.S. Dollar
Notional amounts	2,645	1,743
Not Designated as Hedging Instrument | Hong Kong, Dollars
Notional amounts	2,628	915
Not Designated as Hedging Instrument | All other
Notional amounts	$ 8,151	$ 5,548