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Property and Equipment, net
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property and Equipment, net Property and Equipment, net
    Property and equipment consisted of the following at December 31, 2021 and 2020 (in thousands):
 December 31,
 20212020
Computer equipment, software, and internally developed software$77,237 $66,198 
Furniture and fixtures3,794 4,610 
Leasehold improvements15,664 15,727 
 96,695 86,535 
Less: Accumulated depreciation(77,540)(65,114)
Total property and equipment, net$19,155 $21,421 

    Included in the table above are property and equipment of $1.3 million and $0.9 million as of December 31, 2021 and 2020, respectively, which are capitalizable but had not yet been placed in service. These balances were comprised primarily of capitalized software not ready for its intended use.
    Total depreciation and amortization expense of property and equipment was $14.6 million, $18.1 million, and $18.3 million for the years ended December 31, 2021, 2020, and 2019, respectively.
    Amortization of internal use capitalized software development costs was $12.2 million, $13.1 million, and $12.9 million for the years ended December 31, 2021, 2020, and 2019, respectively.