Future Minimum Lease Payments Under Operating and Finance Leases (Details) - USD ($) $ in Thousands		Apr. 03, 2020		Dec. 31, 2019
Operating Lease
2020 (remainder of year)		$ 3,971
2021		6,806
2022		5,716
2023		4,848
2024		4,318
Thereafter		25,523
Total minimum lease payments		51,182
Less: Interest		(13,500)
Present value of lease liabilities		37,682		$ 39,151
Finance Lease
2020 (remainder of year)	[1]	1,205
2021	[1]	9,012
2022	[1]	907
2023	[1]	930
2024	[1]	954
Thereafter	[1]	4,440
Total minimum lease payments	[1]	17,448
Less: Interest	[1]	(1,984)
Present value of lease liabilities		$ 15,464	[1]	$ 16,152

[1] Future minimum lease payments under finance leases include the exercise price of an option to purchase a facility in Germany in 2021.