v3.10.0.1

Property and equipment | 12 Months Ended
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Dec. 31, 2018
Property and equipment |
Property and equipment | 7. Property and equipment The following is a summary of property and equipment, at cost less accumulated depreciation and amortization:
|  | December 31,
|  | 2018 |  | 2017
Leasehold improvements |  | $ | 474,808 |  | $ | 418,023
Software |  |  | 51,534 |  |  | 42,281
Construction in progress |  |  | 40,369 |  |  | 27,291
Computer equipment |  |  | 14,215 |  |  | 13,245
Furniture, fixtures and office equipment |  |  | 2,141 |  |  | 1,806
Total property and equipment |  |  | 583,067 |  |  | 502,646
Less: accumulated depreciation and amortization |  |  | (268,888) |  |  | (240,287)
Total property and equipment, net |  | $ | 314,179 |  | $ | 262,359
Included in property and equipment at December 31, 2018 and 2017 was equipment acquired under capital leases totaling $16,284 and $12,714, respectively, and related accumulated depreciation and amortization of $6,245 and $3,744, respectively. Depreciation and amortization expense, which includes depreciation and amortization for property and equipment under capital leases, is allocated on a specific identification basis as follows on the accompanying consolidated statements of operations:
|  | Year Ended
|  | December 31,
|  | 2018 |  | 2017 |  | 2016
Network access |  | $ | 49,766 |  | $ | 42,435 |  | $ | 27,013
Network operations |  |  | 17,590 |  |  | 16,382 |  |  | 13,966
Development and technology |  |  | 10,443 |  |  | 9,247 |  |  | 7,207
General and administrative |  |  | 1,038 |  |  | 1,033 |  |  | 1,016
Total depreciation and amortization of property and equipment |  | $ | 78,837 |  | $ | 69,097 |  | $ | 49,202
During the years ended December 31, 2018, 2017, and 2016 we recognized $148, $882, and $54, respectively, of impairment losses primarily related to construction in progress projects that were abandoned. During the years ended December 31, 2018 and 2017, we also recognized $90 and $276, respectively, of losses on disposals of property and equipment.

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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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