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Property and Equipment
 12 Months Ended
Dec. 31, 2022
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
Property and equipment consists of the following (dollars in thousands):
December 31,
Useful Lives20222021
Computer hardware and software
2-10 years
$1,158,284 $1,101,248 
Leasehold improvements
1-15 years
611,082 622,771 
Furniture and equipment
1-10 years
267,604 260,551 
Construction in progressN/A185,332 120,031 
Total cost2,222,302 2,104,601 
Accumulated depreciation and amortization1,386,261 1,288,509 
Property and equipment, net$836,041 $816,092 
Depreciation and amortization expense associated with property and equipment was $260.8 million, $244.9 million and $268.3 million for the years ended December 31, 2022, 2021 and 2020, respectively. During the year ended December 31, 2020, we recorded $29.2 million in asset impairment charges related to property and equipment (see Note 7). There were no asset impairment charges related to property and equipment during the years ended December 31, 2022 and 2021.
Construction in progress includes capitalizable costs incurred during the development stage of computer software and leasehold improvements that have not yet been placed in service.