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Accounting Policies - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) agency	Jun. 30, 2021 USD ($) agency	Jun. 30, 2022 USD ($) agency	Jun. 30, 2021 USD ($) agency	Dec. 31, 2021 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of government agencies | agency	3	3	3	3
Allowance for doubtful accounts	$ 1,401		$ 1,401		$ 1,400
Capitalized contract cost, amortization period (in years)	5 years		5 years
Commission expense	$ 8,700	$ 7,500	$ 16,900	$ 14,300
Two months
Summary Of Significant Accounting Policies [Line Items]
Percentage of restricted cash balance			0.25
Two years
Summary Of Significant Accounting Policies [Line Items]
Percentage of restricted cash balance			0.75
Sales Revenue, Net | Customer Concentration Risk | Foreign Customers
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage	35.00%	35.30%	34.20%	33.70%
Sales Revenue, Net | Customer Concentration Risk | Government Agencies
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage	18.20%	19.80%	18.20%	20.40%
Sales Revenue, Net | Customer Concentration Risk | Federal Government Agencies
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage	5.20%	6.50%	4.80%	6.50%

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Amount of allowance for credit loss on accounts receivable, classified as current.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of fees incurred for commissions on mutual funds and insurance products.

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