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Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Dec. 31, 2017
SUPPLEMENTAL DISCLOSURE OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH        
Cash and cash equivalents $ 82,583 $ 182,578 $ 163,825 $ 137,522
Restricted cash 57,367 75,910 74,973 47,820
Cash, cash equivalents and restricted cash $ 139,950 $ 258,488 $ 238,798 $ 185,342