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Preferred and Common Stockholders' Equity - Narrative (Details) - USD ($)
3 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2017
Class of Stock [Line Items]          
Preferred stock, authorized (shares) 5,000,000.0        
Preferred stock, par value (dollars per share) $ 0.01        
Preferred stock, outstanding (shares) 0        
Common stock, authorized (shares) 150,000,000.0        
Common stock, par value (dollars per share) $ 0.01        
Common stock, issued (shares) 75,200,000   74,700,000 73,500,000  
Common stock, outstanding (shares) 75,200,000   74,700,000 73,500,000  
Share repurchase program, remaining authorized repurchase amount $ 110,700,000        
Shares repurchased 0 0      
Eighth Share Repurchase Program          
Class of Stock [Line Items]          
Share repurchase program, authorized amount         $ 200,000,000.0