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Long‑Term Debt - Additional Narrative (Details) - USD ($) | Jun. 30, 2021 | Dec. 31, 2020 | Apr. 02, 2020
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Interest Rate Swap | Not Designated as Hedging Instrument |  |  |
Debt Instrument [Line Items] |  |  |
Derivative notional amount |  |  | $ 200,000,000
Derivative fair value | $ 8,082,000 | $ 347,000 |
Credit Facility | Line of Credit |  |  |
Debt Instrument [Line Items] |  |  |
Effective interest rate |  |  | 0.73%

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