Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating lease	$ 518	$ 3,589
Operating cash flows from finance leases	2,157	51
Financing cash flows from finance leases	$ 1,972	$ 503