Fair Value Measurements - Summary of Changes in the Fair Value of Level 3 Contingent Consideration (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Business Combination, Integration Related Costs
Level 3 [Member] | Contingent Consideration [Member]
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 2,511
Fair value adjustment of contingent purchase price	22	[1]
Payment of contingent purchase price	2,680	[2]
Foreign exchange effect	(147)
Ending balance	$ 0

[1] Subsequent to the acquisition of FeedbackNow, the increases in the fair value of the contingent consideration were primarily due to the achievement of contract bookings during these periods. The Monte Carlo simulation was used to determine the fair value and increases or decreases in the simulation’s inputs would have resulted in higher or lower fair value measurements. These amounts were recognized as acquisition and integration costs in the Consolidated Statements of Income.

[2] During the third quarter of 2020, the second year financial targets were met and $2.7 million was paid to the sellers during the fourth quarter of 2020.