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Debt - Interest Rate Swaps (Narrative) (Details)
12 Months Ended
Dec. 31, 2020
USD ($)
InterestRateSwaps
Dec. 31, 2019
USD ($)
Interest Rate Swaps    
Debt Instrument [Line Items]    
Derivative, Fixed Interest Rate 2.49%  
Interest Rate Swaps | Designated as Hedging Instrument    
Debt Instrument [Line Items]    
Derivative, Fixed Interest Rate 2.49%  
Interest Rate Cash Flow Hedge Liability at Fair Value $ 0 $ 706,000
Gain (Loss) on Cash Flow Hedges, Caption interest expense  
Loss on Interest Rate Cash Flow Hedge Ineffectiveness $ 1,253,000  
LIBOR | Term loans payable | Wells Fargo Bank, National Association    
Debt Instrument [Line Items]    
Debt Instrument, Description of Variable Rate Basis LIBOR  
Cash Flow Hedging | Interest Rate Swaps | Designated as Hedging Instrument    
Debt Instrument [Line Items]    
Number of Interest Rate Derivatives Held | InterestRateSwaps 2  
Types of Items Hedged by Interest Rate Derivatives KeyBank credit agreement  
Payments for Operating Activities $ 1,253,000  
Cash Flow Hedging | Interest Rate Swaps | Wells Fargo Bank, National Association | Designated as Hedging Instrument    
Debt Instrument [Line Items]    
Number of Interest Rate Derivatives Held | InterestRateSwaps 1  
Derivative Notional Amount $ 25,000,000  
Cash Flow Hedging | Interest Rate Swaps | FGI Equipment Finance LLC Term Loan | Designated as Hedging Instrument    
Debt Instrument [Line Items]    
Derivative Notional Amount $ 10,000,000  
Cash Flow Hedging | LIBOR | Interest Rate Swaps | Designated as Hedging Instrument    
Debt Instrument [Line Items]    
Debt Instrument, Description of Variable Rate Basis 30 day LIBOR