Property and Equipment

12 Months Ended

Dec. 31, 2015

(7) Property and Equipment

Property and equipment (in thousands) consisted of the following, as of:


	December 31,
	2015			2014
Transportation equipment	$	48,879		$	48,906
Computer equipment and purchased software		64,615			72,602
Furniture and equipment		11,649			11,477
Leasehold improvements		28,211			28,500
Internally developed software		9,560			9,408

Property and equipment, gross		162,914			170,893
Less: accumulated depreciation and amortization		(97,250	)		(93,041	)

Property and equipment, net	$	65,664		$	77,852

Included in transportation equipment is the Company’s owned corporate aircraft, including capitalizable costs related to the repairs to the aircraft, and aircraft-related equipment. As of December 31, 2015, the net asset value of the aircraft and aircraft-related equipment was $40.0 million, net of $8.6 million of accumulated depreciation. As of December 31, 2014, the net asset value of the aircraft and aircraft-related equipment was $41.5 million, net of $7.1 million of accumulated depreciation.

Included in computer equipment at December 31, 2015 and December 31, 2014 is $2.4 million and $2.9 million, respectively, acquired under capital lease arrangements. At December 31, 2015 and December 31, 2014, accumulated amortization relating to computer equipment under capital lease arrangements totaled $2.3 million and $2.5 million, respectively.

Depreciation and amortization expense related to property and equipment, including assets under capital leases, was $14.0 million, $20.1 million, and $21.0 million for the years ended December 31, 2015, 2014, and 2013, respectively.