v3.8.0.1

Property and Equipment, Net | 12 Months Ended
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Dec. 31, 2017
Property and Equipment, Net |
Property and Equipment, Net | 4. Property and Equipment, Net Property and equipment, net consisted of the following as of:
|  | December 31, 2017 |  | December 31, 2016 |
|  | (in thousands) |
Computer hardware |  | $ | 8,519 |  | $ | 3,935 |
Furniture and office equipment |  |  | 5,354 |  |  | 2,204 |
Leasehold improvements |  |  | 42,086 |  |  | 6,689 |
Leasehold improvements in process |  |  | 194 |  |  | 6,864 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  |  | 56,153 |  |  | 19,692 |
Accumulated depreciation and amortization |  |  | (7,098 | ) |  | (4,096 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Property and equipment, net |  | $ | 49,055 |  | $ | 15,596 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Depreciation expense of property and equipment was $5.5 million, $1.7 million and $1.1 million for the years ended December 31, 2017, 2016 and 2015, 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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