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Debt - Interest Rate Swaps (Narrative) (Details) | 12 Months Ended |
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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 |

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