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Interest Expense and Amortized Debt Issuance Costs | 9 Months Ended
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Sep. 30, 2021
Interest Expense And Amortized Debt Issuance Costs [Abstract] |
Interest Expense and Amortized Debt Issuance Costs | Interest Expense and Amortized Debt Issuance Costs The following tables summarize interest expense and amortized debt issuance costs for the three and nine months ended September 30 (in thousands):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Interest expense |  | $ | 5,842 |  |  | $ | 4,038 |  |  | $ | 15,535 |  |  | $ | 14,710 |
Amortized debt issuance costs |  | 572 |  |  | 474 |  |  | 1,735 |  |  | 1,451 |
Interest expense and amortized debt issuance costs |  | $ | 6,414 |  |  | $ | 4,512 |  |  | $ | 17,270 |  |  | $ | 16,161 |

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