Future Minimum Lease Payments Under Operating and Finance Leases (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Operating Leases
2020	$ 6,157
2021	6,485
2022	5,451
2023	4,762
2024	4,420
Thereafter	26,141
Total minimum lease payments	53,416
Less: interest	(14,265)
Present value of lease liabilities	39,151
Finance Leases
2020	1,738	[1]
2021	9,278	[1]
2022	907	[1]
2023	930	[1]
2024	954	[1]
Thereafter	4,440	[1]
Total minimum lease payments	18,247	[1]
Less: interest	(2,095)	[1]
Present value of lease liabilities	$ 16,152	[1]

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