Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

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Income Taxes - Narrative (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Mar. 28, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax            
Cumulative loss period     3 years      
Income tax receivable $ 2,900,000   $ 2,900,000      
Unrecognized tax benefits, reduction resulting from lapse of applicable statute of limitations     800,000      
Unrecognized tax benefits 500,000   500,000      
Unrecognized tax benefits that would impact effective tax rate 1,900,000   1,900,000 $ 2,600,000 $ 2,200,000  
Penalties or interest liabilities accrued 0   0 0 0  
Pretax income     (7,000,000.0) 12,200,000 7,300,000  
Foreign earnings repatriated           $ 10,300,000
Income tax expense on foreign earnings           $ 1,400,000
Foreign subsidiaries' undistributed earnings 23,200,000   23,200,000      
Tax Cuts and Jobs Act, income tax expense (benefit)     (100,000) $ 800,000 (200,000)  
Other tax expense (benefit)     (1,500,000)      
Federal            
Income Tax            
Operating loss carryforwards 26,400,000   26,400,000      
Operating loss carryforwards expected to be utilized 6,300,000   6,300,000      
Operating loss carryforwards, subject to expiration 5,900,000   5,900,000      
Operating loss carryforwards, not subject to expiration 400,000   $ 400,000      
Operating loss carryforwards expiration beginning year     2039      
Operating loss carryforwards expiration ending year     2040      
Tax credit carryforwards 1,800,000   $ 1,800,000      
Income tax expense on foreign earnings         $ 400,000  
Valuation allowance, deferred tax asset, increase (decrease) 14,100,000 $ 7,000,000.0 23,300,000      
Federal | Tax Year 2020            
Income Tax            
Operating loss carryforwards 20,100,000   20,100,000      
Capital losses amount 6,600,000   6,600,000      
State            
Income Tax            
Operating loss carryforwards expected to be utilized 5,700,000   5,700,000      
Net operating loss carryforwards $ 132,900,000   $ 132,900,000      
Operating loss carryforwards expiration beginning year     2021      
Operating loss carryforwards expiration ending year     2040