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Debt and Contingent Obligation - Schedule of Fixed Charge Coverage Ratios and Leverage Ratios (Details) - Secured Debt - Xcel Term Loan
Mar. 31, 2020
September 30, 2020 | Second Amendment  
Debt Instrument [Line Items]  
Fixed charge coverage ratio required to meet loan covenant 1.00
Leverage ratio required for loan covenant 3.50
December 31, 2020, and thereafter | Second Amendment  
Debt Instrument [Line Items]  
Fixed charge coverage ratio required to meet loan covenant 1.10
December 31, 2019  
Debt Instrument [Line Items]  
Leverage ratio required for loan covenant 2.90
June 30, 2020 | Second Amendment  
Debt Instrument [Line Items]  
Leverage ratio required for loan covenant 4.25
December 31, 2020 | Second Amendment  
Debt Instrument [Line Items]  
Leverage ratio required for loan covenant 2.75
March 31, 2021, June 30, 2021 and September 30, 2021 | Second Amendment  
Debt Instrument [Line Items]  
Leverage ratio required for loan covenant 1.70
December 31, 2021 and each Fiscal Quarter end thereafter | Second Amendment  
Debt Instrument [Line Items]  
Leverage ratio required for loan covenant 1.50