Accumulated Other Comprehensive Income (Loss) (Activity and Classification of Derivative Deferral in AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Derivative Instruments, Gain (Loss)
Net gain (loss)	$ (1,025)	$ (254)	$ 420	$ (1,346)
Tax effect	256	116	(284)	376
Net deferral in AOCIL of derivatives	(769)	(138)	136	(970)
Foreign Currency Contracts
Derivative Instruments, Gain (Loss)
Net deferral in AOCIL of derivatives (effective portion)	(1,655)	(323)	(827)	(2,109)
Interest Rate Swaps
Derivative Instruments, Gain (Loss)
Net deferral in AOCIL of derivatives (effective portion)	$ 630	$ 69	$ 1,247	$ 763