Property and Equipment

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property and equipment consists of the following (dollars in thousands):


		December 31,
	Useful Lives	2020		2019
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 progress	N/A	117,274		129,671
Total cost		1,889,896		1,907,104
Less: Accumulated depreciation and amortization		1,074,887		1,070,898
Property and equipment, net		$	815,009	$	836,206

Depreciation and amortization expense associated with property and equipment was $268.3 million, $207.8 million and $192.8 million for the years ended December 31, 2020, 2019 and 2018, 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).

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.