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

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.21.2
Summary of Significant Accounting Policies - 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
Percentage of voting rights held by equity holders pre combination 54.00%   54.00%      
Foreign Currency Transaction Gain (Loss), Unrealized         $ 200 $ 1,400
Restricted Investments maturity period         90 days  
Capitalized Computer Software, Net         $ 23,200 19,800
Impairment of Intangible Assets, Finite-lived           3,892
Goodwill, Impairment Loss         0 0
Effective income tax rate percentage 45.10% 21.20% 37.90% 21.60%    
Advertising Expense         100 100
Long Term Cash Incentive Plan [Member]            
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount         $ 0  
Maximum [Member]            
Effective income tax rate percentage         50.00%  
Software Development [Member] | Maximum [Member]            
Finite-Lived Intangible Asset, Useful Life         5 years  
Software Development [Member] | Minimum [Member]            
Finite-Lived Intangible Asset, Useful Life         3 years  
Computer Software, Intangible Asset [Member]            
Impairment of Intangible Assets, Finite-lived         $ 0 $ 3,900
Computer Software, Intangible Asset [Member] | Maximum [Member]            
Finite-Lived Intangible Asset, Useful Life         5 years  
Computer Software, Intangible Asset [Member] | Minimum [Member]            
Finite-Lived Intangible Asset, Useful Life         3 years