Quarterly report pursuant to Section 13 or 15(d)

Organization and Basis of Presentation - Changes Due to Adoption of Topic 606 for Statements of Cash Flow (Details)

v3.19.2
Organization and Basis of Presentation - Changes Due to Adoption of Topic 606 for Statements of Cash Flow (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Sep. 30, 2018
Jun. 30, 2018
Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Cash and cash equivalents $ 71,084 $ 349,245    
Cash, cash equivalents and restricted cash 78,969 356,559 $ 242,344 $ 179,727
Accounting Standards Update 2014-09        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Cash and cash equivalents 71,084 349,245 229,021 166,252
Restricted cash (recorded within "other current assets") 7,885 7,314 13,323 13,475
Cash, cash equivalents and restricted cash $ 78,969 $ 356,559 $ 242,344 $ 179,727