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Debt - Narrative (Details) - USD ($)
3 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Jul. 10, 2020
Jun. 30, 2020
Debt Instrument [Line Items]        
Debt issuance costs, net $ 5,600,000      
Debt instrument, term 8 years      
Amortization of debt issuance costs $ 100,000      
Interest costs 17,700,000 $ 7,400,000    
Interest costs, capitalized 2,800,000 2,000,000.0    
Loss on debt prepayment 8,200,000 $ 0    
Interest Rate Swaps        
Debt Instrument [Line Items]        
Derivative, gain on derivative $ 2,300,000      
Credit Agreement        
Debt Instrument [Line Items]        
Borrowing rate 1.65%      
Senior unsecured notes, 6.375% due July 2028        
Debt Instrument [Line Items]        
Face amount $ 400,000,000.0   $ 400,000,000  
Interest rate 6.375%     6.375%
Senior unsecured notes, 5.20% due July 2021        
Debt Instrument [Line Items]        
Face amount     $ 250,000,000.0 $ 250,000,000.0
Interest rate 5.20%     5.20%
Loss on debt prepayment $ 10,500,000      
Credit Agreement        
Debt Instrument [Line Items]        
Maximum borrowing capacity 400,000,000.0      
Letters of credit issued 6,000,000.0      
Credit Agreement available for future borrowings $ 394,000,000.0      
Credit Agreement | LIBOR        
Debt Instrument [Line Items]        
Interest rate margin 1.25%      
Credit Agreement | LIBOR | Minimum        
Debt Instrument [Line Items]        
Interest rate margin 1.00%      
Credit Agreement | LIBOR | Maximum        
Debt Instrument [Line Items]        
Interest rate margin 1.75%      
Credit Agreement | Base Rate        
Debt Instrument [Line Items]        
Interest rate margin 0.25%      
Credit Agreement | Base Rate | Minimum        
Debt Instrument [Line Items]        
Interest rate margin 0.00%      
Credit Agreement | Base Rate | Maximum        
Debt Instrument [Line Items]        
Interest rate margin 0.75%      
Letters of credit        
Debt Instrument [Line Items]        
Commitment fee rate 0.20%      
Letter of credit fees 1.50%      
Required interest coverage ratio 3.50      
Letters of credit | Minimum        
Debt Instrument [Line Items]        
Commitment fee rate 0.125%      
Letter of credit fees 1.00%      
Letters of credit | Maximum        
Debt Instrument [Line Items]        
Commitment fee rate 0.40%      
Letter of credit fees 1.75%      
Required debt to capital ratio (less than) 0.55