Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Property, Plant and Equipment [Line Items]
Restricted Cash and Cash Equivalents	$ 17,700	$ 19,400
Restricted Cash included in other current assets	1,391	1,600	$ 2,404
Restricted Cash included in other assets	$ 16,277	$ 17,800	$ 16,883