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LEASES (Tables) | 12 Months Ended
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Dec. 31, 2021
LEASES |
Components of operating lease cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
​ |  | 2021 |  | 2020 | ​ | 2019
Operating lease cost | ​ | $ | 23,443 | ​ | $ | 22,920 | ​ | $ | 11,052
Short-term and variable lease cost | ​ | ​ | 2,555 | ​ | ​ | 1,895 | ​ | ​ | 4,726
Total operating lease cost | ​ | $ | 25,998 | ​ | $ | 24,815 | ​ | $ | 15,778
Schedule of maturities of operating lease liabilities | ​
​ | ​ | ​ | ​
Year Ending December 31, |  | ​ | ​
2022 | ​ | $ | 20,416
2023 | ​ |  | 17,230
2024 | ​ |  | 14,812
2025 | ​ | ​ | 12,426
2026 | ​ | ​ | 11,079
Thereafter | ​ | ​ | 65,785
Total lease payments | ​ | ​ | 141,748
Less: Interest | ​ | ​ | (30,725)
Present value of lease liabilities | ​ | $ | 111,023
Schedule of other information related to leases | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, | ​
​ | ​ | 2021 |  | 2020 | ​
Weighted average remaining lease term (in years) | ​ | ​ | 9.81 | ​ | ​ | 10.65 | ​
Weighted average discount rate | ​ | ​ | 4.51 | % | ​ | 4.63 | %
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2021 |  | 2020 | ​ | 2019
Cash paid for operating leases | ​ | $ | 23,668 | ​ | $ | 21,877 | ​ | $ | 12,101
Right-of-use assets obtained in exchange for operating lease liabilities | ​ | $ | 16,399 | ​ | $ | 33,741 | ​ | $ | 84,551

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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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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