XML 88 R73.htm IDEA: XBRL DOCUMENT v3.20.4
Derivative Instruments (Fair Value of Cash Flow Derivative Instruments) (Details) - Designated as Hedging Instrument [Member] - Cash Flow Hedging [Member] - Interest rate contracts [Member] - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Other Assets Current [Member]    
Derivatives Fair Value [Line Items]    
Asset Derivatives, Fair Value $ 63  
Other Noncurrent Assets [Member]    
Derivatives Fair Value [Line Items]    
Asset Derivatives, Fair Value 18,466 $ 1,601
Accounts Payable and Accrued Liabilities [Member]    
Derivatives Fair Value [Line Items]    
Liability Derivatives, Fair Value 1,010  
Other Long-term Obligations [Member]    
Derivatives Fair Value [Line Items]    
Liability Derivatives, Fair Value $ 45,100 $ 22,398