Leases - Schedule of maturities of lease liabilities (Details) $ in Thousands	Dec. 28, 2019 USD ($)
Operating Leases
2020	$ 14,620
2021	12,492
2022	8,693
2023	6,205
2024	3,890
Thereafter	6,776
Total lease payments	52,676
Less: Interest	(4,995)
Present value of lease liabilities	47,681
Finance Leases
2020	990
2021	875
2022	708
2023	438
2024	199
Thereafter	11
Total lease payments	3,221
Less: Interest	(514)
Present value of lease liabilities	$ 2,707