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Pension Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2017
Apr. 01, 2016
Mar. 31, 2017
Apr. 01, 2016
Pension Plans [Abstract]        
Service cost
Interest on projected benefit obligation 284 277 568 554
Less estimated return on plan assets 274 299 548 598
Amortization of unrecognized losses 141 155 283 310
Net periodic benefit cost $ 151 $ 133 $ 303 $ 266