We have entered into various operating lease agreements for automobiles, offices and manufacturing facilities throughout the world. At December 31, 2021, our operating leases had remaining lease terms of up to 39 years, including any reasonably probable extensions.


(In thousands)	December 31, 2021		December 31, 2020
Assets:
Operating lease right-of-use assets	$	19,847	$	19,522
Liabilities:
Other accrued liabilities	$	4,769	$	6,094
Long-term operating lease obligations	14,266		13,681
Total lease liabilities	$	19,035	$	19,775

We recorded an impairment of a ROU asset of $0.8 million during the fourth quarter of the year ended December 31, 2019. This impairment was associated with the sale of our call center in Euclid, Ohio, which was completed in February 2020.

Operating lease expense, including variable and short-term lease costs which were insignificant to the total, operating lease cash flows and supplemental cash flow information were as follows:


	Year Ended December 31,
(In thousands)	2021		2020
Cost of sales	$	2,508	$	1,896
Selling, general and administrative expenses	4,151		4,040
Total operating lease expense	$	6,659	$	5,936
Operating cash outflows from operating leases	$	6,555	$	6,552
Operating lease right-of-use assets obtained in exchange for lease obligations	$	7,017	$	3,743
Non-cash release of operating lease obligations (1)	$	654	$	—

(1) During the year ended December 31, 2021, we were released from our guarantee of the lease obligation related to our Ohio call center which was sold in February 2020.

The weighted average remaining lease liability term and the weighted average discount rate were as follows:


	Year Ended December 31,
	2021		2020
Weighted average lease liability term (in years)	4.30		3.70
Weighted average discount rate	3.17	%	3.84	%

The following table reconciles the undiscounted cash flows for each of the first five years and thereafter to the operating lease liabilities recognized in our consolidated balance sheet at December 31, 2021. The reconciliation excludes short-term leases that are not recorded on the balance sheet.


(In thousands)
2022	$	5,641
2023	4,891
2024	3,389
2025	2,930
2026	2,182
Thereafter	1,357
Total lease payments	20,390
Less: imputed interest	(1,355)
Total lease liabilities	$	19,035

At December 31, 2021, we had two operating leases that had not yet commenced, with terms of three years. The total initial lease liability associated with these leases is $0.6 million, which is not reflected within the maturity schedule above.

Rental costs associated with operating leases incurred during a construction period were expensed for the years ended December 31, 2021, 2020 and 2019.

We operate one factory within the PRC on which the land is leased from the government as of December 31, 2021. This land lease was prepaid to the PRC government at the time our subsidiary occupied the land. We have obtained a land-use right certificate for the land pertaining to this factory.

The factory is located in the city of Yangzhou in the Jiangsu province. The remaining net book value of this operating lease ROU was $2.3 million at December 31, 2021, and is being amortized on a straight-line basis over the remaining term of approximately 37 years. The buildings located on this land had a net book value of $15.0 million at December 31, 2021 and are being depreciated over a remaining weighted average period of 17 years.