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Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Tax Contingency [Line Items]    
Change in net deferred tax liabilities $ 4,183  
Unrecognized tax benefits before impact of deductions for state taxes, excluding interest and penalties 6,468 $ 4,037
Unrecognized tax benefits that would impact effective tax rate 5,600 $ 3,511
Accrued interest, expense net of the benefit of tax deductions 107  
Cumulative reduction in unrecognized tax benefits, due to lapsing of statutes of limitations 80  
Connecticut    
Income Tax Contingency [Line Items]    
Operating loss carryforwards 29,555  
Tax credit carryforward 1,033  
Maine    
Income Tax Contingency [Line Items]    
Operating loss carryforwards $ 1,087