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Derivative Instruments (Fair Value) (Details) - Designated as Hedging Instrument - USD ($)
$ in Thousands
Mar. 31, 2020
Jan. 31, 2020
Interest Rate Swap Settlement Date January 2021 | Cash Flow Hedging    
Derivative [Line Items]    
Derivative, notional amount $ 200,000  
Interest Rate Swap Settlement Date January 2021 | Other Accrued Liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Derivative liability (1,905)  
Interest Rate Swap Settlement Date January 2021 | Other Long-Term Liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Derivative liability 0  
Interest Rate Swap Settlement Date January 2022 | Cash Flow Hedging    
Derivative [Line Items]    
Derivative, notional amount 200,000  
Interest Rate Swap Settlement Date January 2022 | Other Accrued Liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Derivative liability 0  
Interest Rate Swap Settlement Date January 2022 | Other Long-Term Liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Derivative liability (4,412)  
Interest Rate Swap    
Derivative [Line Items]    
Derivative, notional amount   $ 400,000
Interest Rate Swap | Other Accrued Liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Derivative liability (1,905)  
Interest Rate Swap | Other Long-Term Liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Derivative liability $ (4,412)