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Leases | 12 Months Ended
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Dec. 31, 2021
Leases [Abstract] |
Leases | Leases We lease certain transportation and mobile manufacturing equipment such as railcars and forklifts, as well as real estate. Components of lease expense are as follows:
|  | For the Year Ended December 31,
|  | 2021 |  | 2020 |  | 2019
|  | (Dollars in thousands)
Operating lease cost |  | $ | 5,399 |  |  | $ | 6,138 |  |  | $ | 4,816 |
Short-term lease cost |  | 408 |  |  | 159 |  |  | 14 |
Variable lease cost |  | 453 |  |  | 429 |  |  | 227 |
Total lease cost |  | $ | 6,260 |  |  | $ | 6,726 |  |  | $ | 5,057 |
Supplemental cash-flow and other information related to leases is as follows:
|  | For the Year Ended December 31,
|  | 2021 |  | 2020 |  | 2019
|  | (Dollars in thousands)
RoU assets obtained in exchange for new operating lease liabilities (non-cash) |  | 5,584 |  |  | 5,262 |  |  | 4,995 |
Cash payments for operating leases |  | (5,466) |  |  | (6,177) |  |  | (4,724) |
Supplemental balance sheet information related to leases is as follows:
|  |  | As of December 31,
|  |  | 2021 |  | 2020
|  |  | (Dollars in thousands)
| Location |  |  |  |
Operating RoU lease assets | Other assets |  | $ | 7,646 |  |  | $ | 7,164 |
Current operating lease liabilities | Other accrued liabilities |  | 4,109 |  |  | 4,102 |
Non-current operating lease liabilities | Other long-term obligations |  | 3,528 |  |  | 3,195 |
Total operating lease liabilities |  |  | $ | 7,637 |  |  | $ | 7,297 |
Weighted average remaining lease term (in years) |  |  | 2.3 |  | 2.7
Weighted average discount rate |  |  | 4.31 | % |  | 5.82 | %
As of December 31, 2021, lease commitments under non-cancelable operating leases extending for one year or more will require the following future payments:
|  | (Dollars in thousands)
2022 |  | 4,200 |
2023 |  | 2,238 |
2024 |  | 969 |
2025 |  | 451 |
2026 and after |  | 152 |
Total lease payments |  | $ | 8,010 |
Less: Imputed interest |  | (373) |
Present value of lease payments |  | $ | 7,637 |
As of December 31, 2021, we have not entered into any additional operating lease commitments that have yet to commence.

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 + Details
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