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Property and Equipment | 12 Months Ended
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Dec. 31, 2017
Property, Plant and Equipment [Abstract] |
Property and Equipment. | Property and Equipment Property and equipment at December 31, 2017 and 2016 consisted of the following (in thousands):
|  | 2017 |  | 2016
Computer hardware and software |  | $ | 115,444 |  |  | $ | 96,138 |
Furniture, fixtures and equipment |  | 17,556 |  |  | 14,956 |
Leasehold improvements |  | 16,628 |  |  | 12,670 |
Work-in-progress |  | 4,565 |  |  | 5,522 |
|  | 154,193 |  |  | 129,286 |
Less -- accumulated depreciation |  | (96,197 | ) |  | (72,344 | )
|  | $ | 57,996 |  |  | $ | 56,942 |
Depreciation expense related to property and equipment was $25.2 million in 2017, $22.6 million in 2016 and $16.8 million in 2015 and is included in SG&A expenses. The Company has capitalized costs related to its various technology initiatives. At December 31, 2017 and 2016, the net book value of the property and equipment related to computer software was $33.3 million and $31.8 million, respectively, which included work-in-progress of $3.2 million and $3.1 million, 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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