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Property and Equipment
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Property and Equipment
8. Property and Equipment

Property and equipment consist of the following:
December 31,
20202019
Computer hardware$184,145 $214,880 
Computer software52,135 64,509 
Furniture and fixtures8,951 9,546 
Leasehold improvements23,389 25,768 
268,620 314,703 
Less: Accumulated depreciation(256,888)(288,178)
Total$11,732 $26,525 
Depreciation expense was approximately $15.6 million, $43.5 million and $55.8 million for 2020, 2019, and 2018, respectively. Amortization of property and equipment recorded under capital leases are included in depreciation expense.