6. Property and equipment

The following is a summary of property and equipment, at cost less accumulated depreciation and amortization:

	December 31,
	2016			2015
Leasehold improvements	$	358,477		$	243,743
Software		33,349			24,349
Construction in progress		18,859			57,692
Computer equipment		10,878			10,366
Furniture, fixtures and office equipment		1,760			1,738

Total property and equipment		423,323			337,888
Less: accumulated depreciation and amortization		(172,558	)		(123,388	)

Total property and equipment, net	$	250,765		$	214,500

Included in property and equipment at December 31, 2016 and 2015 was equipment acquired under capital leases totaling $8,780 and $5,080, respectively, and related accumulated depreciation and amortization of $2,352 and $932, 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:

	For the Years Ended December 31,
	2016		2015		2014
Network access	$	27,013	$	22,666	$	18,074
Network operations		13,966		9,058		5,662
Development and technology		7,207		5,441		3,381
General and administrative		1,016		1,128		329

Total depreciation and amortization of property and equipment	$	49,202	$	38,293	$	27,446

During the years ended December 31, 2016 and 2015, the company recognized $54 and $215, respectively, of impairment losses primarily related to build-out projects that were abandoned.

During the year ended December 31, 2014, the Company recognized $406 of impairment losses related to a change in the use of certain software developed for internal use that indicated that the carrying value of those assets will not be recoverable, and $494 of net impairment losses related to a venue termination agreement that resulted in the abandonment of our Wi-Fi network assets and the release of the corresponding capital lease obligations associated with those assets. The impairment charges for internal use software and abandoned Wi-Fi network assets are included within development and technology expenses and general and administrative expenses, respectively, in the accompanying consolidated statements of operations.