Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 30, 2017	Sep. 30, 2017
Assets
Currency contracts	$ 151	$ 150
Total assets	5,178	3,649
Liabilities
Currency contracts	541	551
Total liabilities	541	551
Level 1
Assets
Currency contracts	0	0
Total assets	0	0
Liabilities
Currency contracts	0	0
Total liabilities	0	0
Level 2
Assets
Currency contracts	151	150
Total assets	5,178	3,649
Liabilities
Currency contracts	541	551
Total liabilities	541	551
Level 3
Assets
Currency contracts	0	0
Total assets	0	0
Liabilities
Currency contracts	0	0
Total liabilities	0	0
Interest rate swaps
Assets
Interest rate swaps	5,027	3,499
Interest rate swaps | Level 1
Assets
Interest rate swaps	0	0
Interest rate swaps | Level 2
Assets
Interest rate swaps	5,027	3,499
Interest rate swaps | Level 3
Assets
Interest rate swaps	$ 0	$ 0