Property and Equipment.

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

PROPERTY AND EQUIPMENT.

5. PROPERTY AND EQUIPMENT.

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

	December 31,
	2020			2019
Facilities and plant equipment	$	357,740		$	495,513
Land		4,837			7,219
Other equipment, vehicles and furniture		7,858			11,229
Construction in progress		11,828			15,793
		382,263			529,754
Accumulated depreciation		(152,777	)		(197,228	)
	$	229,486		$	332,526

Depreciation expense was $30,268,000 and $40,931,000 for the years ended December 31, 2020 and 2019, respectively.

For the years ended December 31, 2020 and 2019, the Company capitalized interest of $224,000 and $563,000, respectively, related to its capital investment activities.