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LEASES (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Feb. 01, 2021 | Dec. 31, 2020
LEASES |  |  |  |
Operating lease assets |  |  | $ 45,600 |
Operating lease liabilities |  |  | $ 45,300 |
Maturities of the Company's operating lease liabilities |  |  |  |
2021 | $ 10,570 |  |  |
2022 | 11,367 |  |  |
2023 | 9,665 |  |  |
2024 | 9,530 |  |  |
2025 | 9,141 |  |  |
Thereafter | 26,289 |  |  |
Total undiscounted lease payments | 76,562 |  |  |
Less amounts representing interest | 5,313 |  |  |
Lease liability | 71,249 |  |  | $ 39,874
Other information related to operating leases: |  |  |  |
Operating lease cost | 3,158 | $ 1,603 |  |
Cash paid for amounts included in the measurement of operating lease liabilities | $ 3,050 | $ 1,811 |  |
Weighted average remaining lease term | 7 years 2 months 12 days | 7 years 10 months 24 days |  |
Weighted average discount rate | 1.87% | 3.25% |  |

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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
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