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Property and Equipment | 12 Months Ended
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Dec. 31, 2018
Property Plant And Equipment [Abstract] |
Property and Equipment |
8. | Property and Equipment
Property and equipment consists of the following (dollars in thousands):
|  |  |  | December 31, |
|  | Useful Lives |  |  | 2018 |  |  |  | 2017 |
Computer hardware and software |  | 3-10 years |  | $ | 838,301 |  |  | $ | 670,059 |
Leasehold improvements |  | 1-15 years |  |  | 472,952 |  |  |  | 415,947 |
Furniture and equipment |  | 1-10 years |  |  | 307,812 |  |  |  | 279,621 |
Equipment under capital leases |  | 3-5 years |  |  | 10,654 |  |  |  | 10,803 |
Total cost |  |  |  |  | 1,629,719 |  |  |  | 1,376,430 |
Accumulated depreciation and amortization |  |  |  |  | (908,027 | ) |  |  | (758,691 | )
Property and equipment, net |  |  |  | $ | 721,692 |  |  | $ | 617,739 |
Depreciation and amortization expense associated with property and equipment was $192.8 million, $166.0 million and $151.2 million for the years ended December 31, 2018, 2017 and 2016, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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