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Income Taxes (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Income Tax Contingency [Line Items]      
Accelerated collection of refundable alternative minimum tax credit $ 1,300,000    
Deferred income tax assets 47,486,000   $ 48,983,000
Valuation allowance 0   $ 0
Decrease in deferred tax assets $ (1,500,000)    
CARES Act | Minimum | Forecast      
Income Tax Contingency [Line Items]      
Deferred payroll taxes   $ 1,500,000  
Tax credits   500,000  
CARES Act | Maximum | Forecast      
Income Tax Contingency [Line Items]      
Deferred payroll taxes   3,000,000  
Tax credits   $ 1,500,000