Property and Equipment

12 Months Ended

Dec. 31, 2021

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,
	2021			2020
Transportation equipment	$	48,645		$	48,645
Computer equipment and purchased software		61,793			61,299
Furniture and equipment		9,990			10,460
Leasehold improvements		28,872			31,403
Internally developed software		9,917			9,917
Property and equipment, gross		159,217			161,724
Less: accumulated depreciation and amortization		(122,630	)		(118,749	)
Property and equipment, net	$	36,587		$	42,975

Transportation equipment consists of the Company’s corporate aircraft, including capitalizable costs related to the repairs to the aircraft, and aircraft-related equipment.  As of December 31, 2021, the net carrying value of the aircraft and aircraft-related equipment was $27.5 million, net of $21.1 million of accumulated depreciation.  As of December 31, 2020, the net carrying value of the aircraft and aircraft-related equipment was $30.0 million, net of $18.6 million of accumulated depreciation.

Depreciation and amortization expenses related to property and equipment were $8.7 million, $11.4 million, and $11.7 million for the years ended December 31, 2021, 2020, and 2019, respectively.