Annual report pursuant to Section 13 and 15(d)

Accounting Standards - Narrative (Details)

v3.20.2
Accounting Standards - Narrative (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Oct. 01, 2019
Sep. 30, 2019
Sep. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Decrease in retained earnings upon adoption $ (385,195)   $ (343,550) $ (299,469)
Operating lease right-of-use assets 7,383   0  
Current portion of operating lease liabilities 2,046   0  
Operating lease liabilities, net of current portion 5,554   0  
Retained Earnings        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Decrease in retained earnings upon adoption $ (155,721)   $ (115,646) $ (72,525)
Accounting Standards Update 2016-02        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Operating lease right-of-use assets   $ 9,100    
Current portion of operating lease liabilities   2,900    
Operating lease liabilities, net of current portion   6,400    
Accounting Standards Update 2016-02 | Retained Earnings        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Decrease in retained earnings upon adoption   $ 200