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Share-Based Compensation
 6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Share-Based Compensation Share-Based CompensationThe following table summarizes share-based compensation expense related to share-based awards recorded in the condensed consolidated statements of income, pursuant to ASC 718, Stock Compensation:
Three Months Ended June 30,Six Months Ended June 30,
2021202020212020
Cost of subscriptions, software services and maintenance$5,909 $4,369 $10,909 $8,621 
Selling, general and administrative expenses19,266 14,017 39,990 27,067 
Total share-based compensation expense$25,175 $18,386 $50,899 $35,688