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Consolidated Statements of Cash Flows (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents $ 68,855 $ 103,311 $ 56,788  
Restricted cash 3,646 3,823 3,559  
Cash, cash equivalents, and restricted cash in Consolidated Statement of Cash Flows $ 72,501 $ 107,134 $ 60,347 $ 41,199