Property and Equipment

12 Months Ended

Dec. 31, 2019

Property Plant And Equipment [Abstract]

Property and Equipment

(6) Property and Equipment

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

	December 31,
	2019			2018
Transportation equipment	$	48,645		$	48,645
Computer equipment and purchased software		58,920			56,933
Furniture and equipment		10,464			10,709
Leasehold improvements		31,023			29,733
Internally developed software		9,849			9,643
Property and equipment, gross		158,901			155,663
Less: accumulated depreciation and amortization		(108,747	)		(103,744	)
Property and equipment, net	$	50,154		$	51,919

Included in transportation equipment is the Company’s corporate aircraft, including capitalizable costs related to the repairs to the aircraft, and aircraft-related equipment.  As of December 31, 2019, the net carrying value of the aircraft and aircraft-related equipment was $32.6 million, net of $16.0 million of accumulated depreciation.  As of December 31, 2018, the net carrying value of the aircraft and aircraft-related equipment was $35.2 million, net of $13.4 million of accumulated depreciation.

Depreciation and amortization expenses related to property and equipment were $11.7 million, $8.3 million, and $8.4 million for the years ended December 31, 2019, 2018, and 2017, respectively.