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Commitments and Contingencies - Narrative (Details)
Mar. 31, 2020
USD ($)
Oct. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Feb. 08, 2018
claim
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Number of putative class action complaints | claim         2
SEC settlement accrual $ 17,500,000     $ 0  
Contingent gain, unrecorded amount, CEO reimbursement 2,122,000        
Purchase commitments, total 381,100,000        
Affiliated          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Purchase commitments, total 122,200,000        
Chief Executive Officer          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Contingent gain, unrecorded amount, CEO reimbursement $ 2,122,000        
Standby Letters of Credit | Bank of America 2018 Credit Agreement | Bank of America | Revolving Credit Facility          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Credit facility, maximum borrowing capacity   $ 6,400,000 $ 3,200,000