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Derivative Instruments (Details) - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jun. 28, 2019
Sep. 25, 2017
Derivative [Line Items]          
Pre-tax (charge) on derivative instruments $ (100,771) $ (12,302) $ 7,296    
Net (gain) loss on financial instruments $ 5,300 10,000 8    
gain/loss convertible debt hedge asset and note obligation valuation     (100)    
June 30, 2017 [Member] [Member] | Swap [Member]          
Derivative [Line Items]          
Stated Interest Rate 2.706%        
Market Value (Liability) $ (3,551) (3,242)      
Derivative Liability, Notional Amount $ 138,750 146,250 $ 150,000    
May 5, 2021 [Member] [Member] [Member] | Swap [Member]          
Derivative [Line Items]          
Stated Interest Rate 1.09%        
Market Value (Liability) $ 41 (111)      
Derivative Liability, Notional Amount $ 13,125 20,625      
May 30, 2021 [Member] | Swap [Member]          
Derivative [Line Items]          
Stated Interest Rate 1.703%        
Market Value (Liability) $ 80 25      
Derivative Liability, Notional Amount $ 13,125 20,625      
March 31, 2022 One [Member] [Member] | Swap [Member]          
Derivative [Line Items]          
Stated Interest Rate 1.90%        
Market Value (Liability) $ 1,116 408      
Derivative Liability, Notional Amount $ 50,000 50,000      
March 31, 2022 Two [Member] [Member] [Member] | Swap [Member]          
Derivative [Line Items]          
Stated Interest Rate 1.95%        
Market Value (Liability) $ 1,722 696      
Derivative Liability, Notional Amount $ 75,000 75,000      
March 31, 2023 [Member] | Swap [Member]          
Derivative [Line Items]          
Stated Interest Rate 2.425%        
Market Value (Liability) $ 6,904 3,866      
Derivative Liability, Notional Amount $ 140,625 $ 148,125   $ 150,000  
Convertible Debt [Member]          
Derivative [Line Items]          
Convertible note hedge shares         8,100