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Financial Instruments - Interest Rate Swaps (Details) | Mar. 31, 2021 USD ($) swap
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Interest rate swaps |
Debt Securities, Available-for-sale [Line Items] |
Number of interest rate swaps expired | swap | 1
Number of interest rate swaps outstanding | swap | 3
Interest rate swap, February 2021 expiration |
Debt Securities, Available-for-sale [Line Items] |
Notional amount | $ 10,000,000.0
Interest rate swap, May 2022 expiration |
Debt Securities, Available-for-sale [Line Items] |
Notional amount | $ 20,000,000.0
Interest rate swap, fixed interest rate | 1.77%
Interest rate swap, June 2023 expiration |
Debt Securities, Available-for-sale [Line Items] |
Notional amount | $ 15,000,000.0
Interest rate swap, fixed interest rate | 2.64%
Interest rate swap, April 2025 expiration |
Debt Securities, Available-for-sale [Line Items] |
Notional amount | $ 50,000,000.0
Interest rate swap, fixed interest rate | 0.885%

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