PROPERTY AND EQUIPMENT

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Property and Equipment

PROPERTY AND EQUIPMENT

Property and equipment consists of the following (in thousands):

	December 31,
	2016			2015
Computer and office equipment	$	29,556		$	22,561
Software capitalized for internal use	16,481			15,600
Vehicles	2,552			1,938
Medical equipment	31,509			28,423
Work in progress	5,746			6,624
Furniture and fixtures	5,318			4,543
Leasehold improvements	16,464			14,285
Property and equipment, gross	107,626			93,974
Less: Accumulated depreciation	(75,091		)	(62,035		)
Property and equipment, net	$	32,535		$	31,939

Work in progress at December 31, 2016 and 2015 includes $5.8 million and $1.8 million, respectively, of internally developed software costs to be capitalized upon completion.

Depreciation expense, including expense related to assets under capital lease, for the years ended December 31, 2016, 2015 and 2014 was $15.4 million, $17.6 million, and $16.4 million, respectively. Depreciation expense for the years ended December 31, 2016, 2015 and 2014 includes $2.2 million, $2.5 million, and $2.4 million, respectively, related to costs related to software capitalized for internal use.

Impairment

The Company, which assesses the impairment of its assets whenever events or changes in circumstances indicate that the carrying value may not be recoverable, has determined that no such events or changes have occurred and therefore, no impairment charge in relation to property, plant and equipment was incurred during the year ended December 31, 2016.