Leases - Future lease payments (Details) $ in Thousands	Sep. 28, 2019 USD ($)
Operating Leases
2020	$ 10,421
2021	41,709
2022	37,542
2023	33,067
2024	26,496
Thereafter	70,484
Total	219,719
Less: Imputed interest	(44,210)
Present value of net lease payments	175,509
Finance Leases
2020	675
2021	1,346
2022	1,359
2023	1,305
2024	1,280
Thereafter	4,262
Total	10,227
Less: Imputed interest	(3,160)
Present value of net lease payments	$ 7,067