Condensed Consolidated Statements of Cash Flows Balance Sheet Reconciliation - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Cash and Cash Equivalents, at Carrying Value	$ 103,765	$ 100,244	$ 102,811
Restricted Cash and Cash Equivalents, Current	16,606	16,640	16,684
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 120,371	$ 116,884	$ 119,495	$ 195,285