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Leases (Tables) | 12 Months Ended
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Dec. 31, 2021
Leases |
Schedule of balance sheet information of operating leases | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | December 31,
(in thousands) |  | Classification |  | 2021 |  | 2020
ROU assets |  | Operating lease ROU assets | ​ | $ | 17,491 | ​ | $ | 19,236
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Lease liabilities |  |  | ​ |  |  | ​ |  |
Current |  | Accrued liabilities | ​ | $ | 2,940 | ​ | $ | 3,564
Noncurrent |  | Operating lease liabilities | ​ |  | 15,940 | ​ |  | 16,925
Total lease liabilities |  |  | ​ | $ | 18,880 | ​ | $ | 20,489
Schedule of components of lease cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
(in thousands) | ​ | 2021 | ​ | 2020 | ​ | 2019
Operating lease cost | ​ | $ | 4,836 | ​ | $ | 4,508 | ​ | $ | 3,966
Short-term lease cost | ​ |  | 169 | ​ |  | 52 | ​ |  | 348
Variable lease cost | ​ |  | 2,123 | ​ |  | 1,652 | ​ |  | 1,607
Total lease cost | ​ | $ | 7,128 | ​ | $ | 6,212 | ​ | $ | 5,921
Schedule of operating lease cash flow and noncash information | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year Ended December 31,
(in thousands) | ​ | 2021 | ​ | 2020 | ​ | 2019
Operating cash flows - cash paid for amounts included in the measurement of operating lease liabilities | ​ | $ | 6,568 | ​ | $ | 5,885 | ​ | $ | 5,420
Operating lease ROU assets obtained in exchange for lease liabilities, net (1) | ​ |  | 2,135 | ​ |  | 4,812 | ​ |  | 2,247
(1) | Includes decreases to our ROU assets of $0.3 million and $0.1 million related to lease amendments and terminations during the years ended December 31, 2021 and 2020, respectively.
Schedule of lease supplemental information | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |
​ | ​ | 2021 | ​ | 2020 | ​ | 2019 | ​
Weighted average remaining lease term (in years) | ​ | 7.2 | ​ | 7.9 | ​ | 8.2 | ​
Weighted average discount rate | ​ | 4.6 | % | 4.8 | % | 5.3 | %
Schedule of maturities of lease liabilities | ​
​ | ​ | ​ | ​
(in thousands) |  | ​ | ​
2022 | ​ | $ | 3,454
2023 | ​ | ​ | 3,453
2024 | ​ |  | 2,998
2025 | ​ |  | 2,575
2026 | ​ |  | 2,321
Thereafter | ​ |  | 7,628
Total lease payments | ​ |  | 22,429
Less: Interest | ​ |  | (3,549)
Total lease liabilities | ​ | $ | 18,880

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- Definition Tabular disclosure of operating lease cash flow and noncash information. + References No definition available. + Details
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- Definition Tabular disclosure of operating lease supplemental information. May include lease term and discount rate. + References No definition available. + Details
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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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