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Leases (Tables) | 9 Months Ended
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Sep. 30, 2021
Leases [Abstract] |
Schedule of supplemental consolidated balance sheet information related to our operating leases | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Nine months ended
​ | ​ | September 30, | ​ | September 30,
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
​ | ​ | (in thousands) | ​ | (in thousands)
Building rent | ​ | $ | 667 | ​ | $ | 808 | ​ | $ | 1,914 | ​ | $ | 2,264
Automobile rentals | ​ |  | 385 | ​ |  | 426 | ​ |  | 1,129 | ​ |  | 1,137
Total net operating lease costs | ​ | $ | 1,052 | ​ | $ | 1,234 | ​ | $ | 3,043 | ​ | $ | 3,401
Schedule of maturities of operating leases | ​
​ | ​ | ​ | ​ | ​
​ | ​ | As of September 30, 2021 | ​
​ | ​ | ​ | (in $ thousands) | ​
2021 | ​ | $ | 702 | ​
2022 | ​ | ​ | 3,238 | ​
2023 | ​ | ​ | 2,564 | ​
2024 | ​ | ​ | 1,771 | ​
2025 | ​ | ​ | 1,639 | ​
Later years | ​ | ​ | 5,930 | ​
Less imputed interest | ​ | ​ | (2,646) | ​
Total lease liabilities | ​ | $ | 13,198 | ​

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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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