Summary of Significant Accounting Policies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) ReportingUnit	Dec. 31, 2017 USD ($)
Accounting Policies [Abstract]
Restricted cash | $	$ 2,886	$ 4,111
Total number of the Company's reporting units	5
Number of reporting units which have goodwill associated with them	3
SBB [Member]
Customer [Line Items]
Change in Margin	2.00%