Property and Equipment

12 Months Ended

Dec. 31, 2021

Property Plant And Equipment [Abstract]

Property and Equipment

3. PROPERTY AND EQUIPMENT

Property and equipment at December 31, 2021 and 2020 are as follows:

		2021			2020
Land	$	9,992		$	9,992
Buildings and improvements		1,315			1,315
Furniture and fixtures		18,568			17,251
Operating equipment		869,953			762,350
Total property and equipment		899,828			790,908
Accumulated depreciation		(444,726	)		(407,866	)
Property and equipment — net	$	455,102		$	383,042

Operating equipment of $2,900 was classified as held for sale, excluded from property and equipment, as of December 31, 2020.

Depreciation expense was $43,016, $38,183 and $37,145, for the years ended December 31, 2021, 2020 and 2019, respectively.