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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Summary of Property and Equipment
Property and equipment consists of the following (dollars in thousands):

December 31,
Useful Lives20202019
Computer hardware and software
2-10 years
$974,490 $931,891 
Leasehold improvements
1-15 years
554,252 510,917 
Furniture and equipment
1-10 years
243,880 334,625 
Construction in progressN/A117,274 129,671 
Total cost1,889,896 1,907,104 
Less: Accumulated depreciation and amortization1,074,887 1,070,898 
Property and equipment, net$815,009 $836,206