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PROPERTY AND EQUIPMENT
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
PROPERTY AND EQUIPMENT
6. PROPERTY AND EQUIPMENT (1)
(in thousands)December 31,
20202019
Leasehold improvements
$52,335 $42,162 
Computer equipment
30,211 25,147 
Furniture and fixtures
10,572 8,524 
Computer software purchased
8,415 7,775 
Computer software developed for internal use
18,542 17,606 
Fixed assets in progress
2,077 4,044 
122,152 105,258 
Less: accumulated depreciation
(81,754)(70,975)
$40,398 $34,283 
(1) Included in other long-term assets.

(in thousands)202020192018
Depreciation expense$17,378 $14,771 $13,875