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LEASES
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
LEASES LEASES
We lease certain facilities, trailers, forklifts and other assets. Leases with an initial term of 12 months or less are not recorded on the balance sheet and expense related to these short-term leases was immaterial for the years ended December 31, 2021, 2020 and 2019. Variable lease expense, principally related to trucks, forklifts, and index-related facility rent escalators, was immaterial for the years ended December 31, 2021, 2020 and 2019. Leases have remaining lease terms of one year to eighteen years. Certain leases include options to renew for an additional term. Where there is reasonable certainty to utilize a renewal option, we include the renewal option in the lease term used to calculate operating lease right-of-use assets and lease liabilities.

Lease expense, supplemental cash flow information, and other information related to leases for the years ended December 31, 2021, 2020 and 2019 were as follows:
(thousands) 2021 2020 2019
Operating lease cost $ 42,081  $ 34,243  $ 31,653 
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases $ 41,061  $ 33,599  $ 30,677 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases $ 78,225  $ 56,526  $ 37,112 
Balance sheet information related to leases as of December 31, 2021 and 2020 was as follows:
(thousands, except lease term and discount rate) 2021 2020
Assets
Operating lease right-of-use assets $ 158,183  $ 117,816 
Liabilities
Operating lease liabilities, current portion $ 40,301  $ 30,901 
Long-term operating lease liabilities 120,161  88,175 
Total lease liabilities $ 160,462  $ 119,076 
Weighted average remaining lease term, operating leases (in years) 5.1 5.3
Weighted average discount rate, operating leases 3.8  % 4.1  %
Maturities of operating lease liabilities were as follows at December 31, 2021 (in thousands):
2022 $ 45,452 
2023 40,553 
2024 32,869 
2025 23,620 
2026 14,498 
Thereafter 21,188 
Total lease payments 178,180 
Less imputed interest (17,718)
Total $ 160,462 

The Company has additional operating leases that have not yet commenced as of December 31, 2021, and therefore, approximately $2.4 million in operating lease right-of-use assets and corresponding operating lease liabilities were not included in our consolidated balance sheet at December 31, 2021. These leases will commence through the second quarter of fiscal 2022 with lease terms of 5 to 10 years.