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Summary of Significant Accounting Policies - Summary of Stock-Based Compensation Expense Recorded in Expense Categories (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Total allocated share-based compensation expense $ 14,543 $ 10,070 $ 10,877
Cost of Services and Fulfillment [Member]      
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Total allocated share-based compensation expense 8,435 6,057 6,156
Selling and Marketing [Member]      
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Total allocated share-based compensation expense 2,774 1,698 1,751
General and Administrative [Member]      
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Total allocated share-based compensation expense $ 3,334 $ 2,315 $ 2,970