General form of registration statement for all companies including face-amount certificate companies

Income Taxes - Additional Information (Detail)

v3.21.2
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]            
Effective income tax rate percentage 45.10% 21.20% 37.90% 21.60%    
Disallowance of interest expenses carryforward, amount         $ 32,200  
Income tax expense benefit $ (3,710) $ (1,518) $ (7,628) $ (5,376) (5,318) $ (12,941)
Undistributed earnings of foreign subsidiaries         4,400  
Unrecognized tax benefits, income tax penalties         $ 17 133
Effective income tax rate reconciliation, other adjustments, percent         50.00%  
Income tax penalties and interest accrued         $ 17 0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount         1,000  
GILTI [Member]            
Operating Loss Carryforwards [Line Items]            
Income tax expense benefit         $ 0 $ 300
Minimum [Member]            
Operating Loss Carryforwards [Line Items]            
Operating loss carryforwards, expiration period         2032  
Tax credit carryforward, expiration period         2035  
Maximum [Member]            
Operating Loss Carryforwards [Line Items]            
Effective income tax rate percentage         50.00%  
Operating loss carryforwards, expiration period         2040  
Tax credit carryforward, expiration period         2040  
U.S. federal research and development tax credit [Member]            
Operating Loss Carryforwards [Line Items]            
Tax credit carryforward, amount         $ 1,800  
Foreign research and development tax credit [Member]            
Operating Loss Carryforwards [Line Items]            
Tax credit carryforward, amount         400  
Federal Tax Authority [Member]            
Operating Loss Carryforwards [Line Items]            
Operating loss carryforwards         7,500  
Federal Tax Authority [Member] | indefinitely Period [Member]            
Operating Loss Carryforwards [Line Items]            
Operating loss carryforwards         1,200  
State and Local Jurisdiction [Member]            
Operating Loss Carryforwards [Line Items]            
Operating loss carryforwards         36,500  
State and Local Jurisdiction [Member] | indefinitely Period [Member]            
Operating Loss Carryforwards [Line Items]            
Operating loss carryforwards         13,600  
Foreign Tax Authority [Member]            
Operating Loss Carryforwards [Line Items]            
Operating loss carryforwards         $ 28,700