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Property and Equipment | 12 Months Ended
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Dec. 31, 2016
Property, Plant and Equipment [Abstract] |
Property and Equipment | 7. Property and Equipment Property and equipment consists of the following (dollars in thousands):
|  |  |  |  | December 31, |
|  | Useful Lives |  |  | 2016 |  |  | 2015 |
Computer hardware and software |  |  | 3-10 years |  |  | $ | 683,738 |  |  | $ | 583,963 |
Leasehold improvements |  |  | 1-15 years |  |  |  | 342,940 |  |  |  | 312,448 |
Furniture and equipment |  |  | 1-10 years |  |  |  | 247,768 |  |  |  | 237,734 |
Equipment under capital leases |  |  | 3-5 years |  |  |  | 10,755 |  |  |  | 10,643 |
Total cost |  |  |  |  |  |  | 1,285,201 |  |  |  | 1,144,788 |
Accumulated depreciation and amortization |  |  |  |  |  |  | (724,445 | ) |  |  | (614,965 | )
Property and equipment, net |  |  |  |  |  | $ | 560,756 |  |  | $ | 529,823 |
Depreciation and amortization expense associated with property and equipment was $151.2 million, $137.2 million and $122.8 million for the years ended December 31, 2016, 2015 and 2014, respectively. During the year ended December 31, 2014, we recorded an impairment loss related to property and equipment of $8.6 million (see Note 5 for additional information). We did not recognize any significant impairment losses related to property and equipment in 2016 and 2015.

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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