Quarterly report pursuant to Section 13 or 15(d)

Supplemental Disclosures - Schedule of Cash, Cash Equivalents and Restricted Cash (Details)

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Supplemental Disclosures - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Text Block [Abstract]        
Cash and cash equivalents $ 149,515 $ 105,565 $ 54,736 $ 349,245
Restricted cash (recorded within "other current assets") 11,434 10,927 7,358 7,314
Cash, cash equivalents and restricted cash $ 160,949 $ 116,492 $ 62,094 $ 356,559