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Leases
3 Months Ended
Mar. 31, 2022
Leases [Abstract]  
Leases Leases
The components of lease expense are as follows:
Three Months Ended
March 31, 2022March 31, 2021
OfficesData CentersTotalOfficesData CentersTotal
(in thousands)
Lease expense$4,409 $5,207 $9,616 $6,543 $6,398 $12,941 
Short term lease expense151 154 76 83 
Variable lease expense50 55 144 73 217 
Sublease income(172)(172)(188)— (188)
Total operating lease expense$4,438 $5,215 $9,653 $6,575 $6,478 $13,053 

As of March 31, 2022, we have additional operating leases, that have not yet commenced which will result in additional operating lease liabilities and right of use assets:
OfficesData Centers
(in thousands)
Additional operating lease liabilities$— $13,523 
Additional right of use assets$— $13,523 
These operating leases will commence during the fiscal year ending December 31, 2022.