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Deferred Contract Acquisition and Fulfillment Costs (Tables)
3 Months Ended
Mar. 31, 2021
Revenue from Contract with Customer [Abstract]  
Summary of Activity of Deferred Contract Acquisition and Fulfillment Costs
The following table summarizes the activity of the deferred contract acquisition and fulfillment costs for the three months ended March 31, 2021 and 2020:
Three Months Ended March 31,
20212020
 (in thousands)
Beginning balance$64,639 $51,260 
Capitalization of contract acquisition and fulfillment costs7,865 5,084 
Amortization of deferred contract acquisition and fulfillment costs(5,909)(4,569)
Ending balance$66,595 $51,775