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Restructuring and integration expense (Tables)
3 Months Ended
Mar. 31, 2022
Restructuring and Related Activities [Abstract]  
Restructuring and integration expense
Restructuring and integration expense is reflected on the consolidated statements of comprehensive income as follows:

 Quarter Ended
March 31,
(in thousands)20222021
Total cost of revenue$59 $899 
Operating expenses16,244 14,313 
Restructuring and integration expense$16,303 $15,212 
Restructuring and integration expense for each period was comprised of the following:
 Quarter Ended
March 31,
(in thousands)20222021
External consulting fees$7,859 $7,383 
Internal labor1,696 2,041 
Employee severance benefits1,125 857 
Other5,623 4,931 
Restructuring and integration expense$16,303 $15,212 
Changes in restructuring and integration accruals
Changes in our restructuring and integration accruals were as follows:
(in thousands)Employee severance benefits
Balance, December 31, 2021
$5,672 
Charges1,629 
Reversals(504)
Payments(3,759)
Balance, March 31, 2022
$3,038