Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating cash flows from finance leases	$ 4	$ 7
Operating cash flows from operating leases	2,236	2,108
Financing cash flows from finance leases	$ 47	$ 76