Leases

12 Months Ended

Dec. 31, 2022

7. LEASES

Our operating leases primarily consist of offices and lab space, machinery and equipment and vehicles. The components of lease expense are as follows (in thousands):


	For the Years Ended December 31,
	2022			2021			2020
Operating lease expense	$	16,595		$	17,253		$	17,848
Short-term lease expense		1,784			1,990			1,801
Variable lease expense		1,414			1,462			1,442
Total lease expense	$	19,793		$	20,705		$	21,091
Other information:
Operating cash flows for operating leases	$	16,598		$	16,367		$	17,049
Right of use assets obtained in exchange for new operating lease obligations	$	5,520		$	5,736		$	5,654
Weighted-average remaining lease term - operating leases	6.88 years			7.62 years			8.69 years
Weighted-average discount rate - operating leases		4.62	%		4.61	%		4.70	%

Scheduled undiscounted lease payments for non-cancellable leases consist of the following (in thousands):


	December 31, 2022
2023	$	13,584
2024		10,294
2025		8,247
2026		6,472
2027		5,168
Thereafter		15,387
Total undiscounted lease payments		59,152
Less: Imputed interest		(9,148	)
Total operating lease liabilities	$	50,004

During the year ended December 31, 2020, the Company recorded $0.5 million on lease abandonment for certain properties that ceased in use and are expected to provide no future economic benefits. There is no lease abandonment cost recorded during the years ended December 31, 2022 and 2021.