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LEASES (Tables) | 12 Months Ended
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Dec. 31, 2021
LEASES |
Summary of maturities of operating lease liabilities | Maturities of the Company’s operating lease liabilities at December 31, 2021 are as follows:
​ | ​ | ​ | ​
​ | ​ | Rent to be
(In thousands) |  | Capitalized
2022 |  | $ | 11,934
2023 |  | ​ | 10,694
2024 |  | ​ | 10,587
2025 |  | ​ | 10,352
2026 |  | ​ | 9,631
Thereafter |  | ​ | 17,306
Total undiscounted lease payments |  | ​ | 70,504
Less amounts representing interest |  | ​ | (4,401)
Operating lease liabilities | ​ | $ | 66,103
Summary of other information related to operating leases | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year Ended
​ | ​ | December 31,
(In thousands) |  | 2021 |  | 2020 |  | 2019
Operating lease cost | ​ | $ | 14,341 | ​ | $ | 6,522 | $ | 6,588
Cash paid for amounts included in the measurement of operating lease liabilities | ​ | ​ | 13,975 | ​ | ​ | 7,030 |  | 6,907
​
​ | ​ | ​ | ​
​ | ​ | December 31, |
​ |  | 2021 |
Weighted average remaining lease term |  | 6.6 | years
Weighted average discount rate |  | 1.79 | %

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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980 + Details
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