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Financings - Convertible Senior Unsecured Notes (Details) - 6.75% Convertible Senior Unsecured Notes - Convertible Debt
1 Months Ended
Oct. 31, 2017
$ / shares
Mar. 31, 2020
USD ($)
Debt Conversion [Line Items]    
Aggregate principal amount of 6.75% convertible senior unsecured notes | $   $ 205,000,000.0
Interest rate stated percentage 6.75%  
Redemption price, percentage 100.00%  
Convertible senior unsecured notes, conversion ratio 0.0831947000  
Convertible senior unsecured notes, conversion price (in dollars per share) | $ / shares $ 12.02