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Deferred Contract Acquisition and Fulfillment Costs (Tables)
12 Months Ended
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]  
Capitalized Contract Cost
The following table summarizes the activity of the deferred contract acquisition and fulfillment costs for the years ended December 31, 2020 and 2019:
Year Ended December 31,
20202019
(in thousands)
Beginning balance$51,260 $39,955 
Capitalization of contract acquisition and fulfillment costs33,525 26,109 
Amortization of deferred contract acquisition and fulfillment costs(20,146)(14,804)
Ending balance$64,639 $51,260