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Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Statement Of Cash Flows [Abstract]        
Cash and cash equivalents $ 126,550 $ 14,472 $ 14,533  
Restricted cash 175 5,333 12,860  
Total cash and restricted cash $ 126,725 [1] $ 19,805 $ 27,393 [1] $ 29,857
[1] (a) The following table provides a reconciliation of cash and restricted cash to amounts reported within the condensed consolidated balance sheets: Cash and cash equivalents $126,550 $14,533 Restricted cash 175 12,860 Total cash and restricted cash $126,725 $27,393