Quarterly report pursuant to Section 13 or 15(d)

Debt - Convertible Senior Notes (Details)

v3.21.2
Debt - Convertible Senior Notes (Details)
1 Months Ended 2 Months Ended 3 Months Ended 9 Months Ended
Oct. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
D
$ / shares
shares
Oct. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
Sep. 16, 2021
$ / shares
Sep. 15, 2021
$ / shares
Debt                
Repayment of debt         $ 42,965,000 $ 42,858,000    
Conversion price (per share) | $ / shares             $ 37.74 $ 25
Convertible senior notes, due 2026                
Debt                
Principal Amount of debt   $ 425,000,000   $ 425,000,000 $ 425,000,000      
Interest rate (stated)   0.75%   0.75% 0.75%      
Issue price ( as percentage)   100.00%   100.00% 100.00%      
Net proceeds         $ 413,500,000      
Sale price (as percentage)   130.00%            
Consecutive trading days | D   30            
Threshold trading days | D   20            
Redemption price (as percentage)   100.00%            
Principal amount denomination for conversion   $ 1,000            
Conversion ratio   0.0399956            
Conversion price (per share) | $ / shares   $ 25.0027   $ 25.0027 $ 25.0027      
Business days | D   5            
Capped calls, authorized shares | shares   5,736,869   5,736,869 5,736,869      
Consecutive trading period | D   5            
Trading price per $1,000notes (as percentage)   98.00%   98.00% 98.00%      
Conditional conversion ratio   0.0529941            
Interest expense       $ 200,000 $ 200,000      
Calculated interest rate   1.30%   1.30% 1.30%      
Initial strike price | $ / shares         $ 25.0027      
Initial cap price | $ / shares         $ 37.7400      
Amount paid for capped calls $ 10,600,000 $ 42,300,000 $ 52,900,000          
Notes Issued On Exercise Of Initial Purchasers' Option [Member]                
Debt                
Principal Amount of debt   $ 40,000,000   $ 40,000,000 $ 40,000,000