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Long‑Term Debt - Schedule of Interest Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Debt Instrument [Line Items] |  |  |  |
Amortization and write-off of deferred debt issuance costs |  |  | $ 2,371 | $ 277
Interest expense other borrowings | $ 45 | $ 13 | 33 | 25
Interest expense | 2,582 | 1,156 | 4,983 | 2,846
Interest Rate Swap |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate swap | 316 | 0 | 617 | 0
Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest expense for debt | 850 | 1,004 | 1,579 | 2,544
Amortization and write-off of deferred debt issuance costs | 221 | 139 | 796 | 277
Interest expense and amortization of debt issuance costs | $ 1,387 | $ 1,143 | $ 2,992 | $ 2,821
Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Weighted average interest rate over time | 2.11% | 1.48% | 2.02% | 2.18%
2026 Notes | Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest expense for debt | $ 217 | $ 0 | $ 371 | $ 0
Amortization and write-off of deferred debt issuance costs | 907 | 0 | 1,561 | 0
Interest expense and amortization of debt issuance costs | 1,124 | 0 | 1,932 | 0
2027 Notes | Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest expense for debt | 12 | 0 | 12 | 0
Amortization and write-off of deferred debt issuance costs | 14 | 0 | 14 | 0
Interest expense and amortization of debt issuance costs | $ 26 | $ 0 | $ 26 | $ 0

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- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
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