Future Minimum Lease Payments Under Operating and Finance Leases (Details) $ in Thousands	Sep. 27, 2019 USD ($)
Operating Lease
2019 (remainder of year)	$ 1,561
2020	6,111
2021	5,868
2022	5,065
2023	4,419
Thereafter	28,415
Total minimum lease payments	51,439
Less: Interest	(14,193)
Present value of lease liabilities	37,246
Finance Lease
2019 (remainder of year)	433	[1]
2020	9,891	[1]
2021	907	[1]
2022	907	[1]
2023	930	[1]
Thereafter	5,394	[1]
Total minimum lease payments	18,462	[1]
Less: Interest	(2,208)	[1]
Present value of lease liabilities	$ 16,254	[1]

[1] Future minimum lease payments under finance lease include the exercise price to purchase a facility in Germany for the year ending December 31, 2020.