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Hedging Activities - Table (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Derivative Instruments Gain Loss [Line Items]          
Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net     $ 2,584,000   $ 3,598,000
Interest Rate Cash Flow Hedge Liability At Fair Value $ 3,356,000   3,356,000   4,672,000
Interest Expense [Member]          
Derivative Instruments Gain Loss [Line Items]          
Derivative Instruments Gain Loss Reclassified From Accumulated OCI Into Income Effective Portion Net (659,000) $ (483,000) (1,302,000) $ (465,000)  
Other Noncurrent Liabilities [Member]          
Derivative Instruments Gain Loss [Line Items]          
Interest Rate Cash Flow Hedge Liability At Fair Value $ 3,356,000   $ 3,356,000   $ 4,672,000