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Derivative Instruments and Hedging Activities - Summary of Cross Currency Swap Agreements (Details) - Cross-currency swap agreements kr in Thousands, $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2021 NOK (kr)
Derivative [Line Items] |  |
Fair Value / Carrying Amount of Asset (Liability) $ | $ (12,704) |
NIBOR | 6.00% |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 146,500 | kr 1,200,000
Derivative, Basis Spread on Variable Rate | 6.00% | 6.00%
Fixed Rate Payable | 7.72% | 7.72%
Fair Value / Carrying Amount of Asset (Liability) $ | $ (8,667) |
Weighted- Average Remaining Term (Years) | 3 months 18 days |
NIBOR | 4.60% |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 102,000 | kr 850,000
Derivative, Basis Spread on Variable Rate | 4.60% | 4.60%
Fixed Rate Payable | 7.89% | 7.89%
Fair Value / Carrying Amount of Asset (Liability) $ | $ (9,843) |
Weighted- Average Remaining Term (Years) | 2 years 2 months 12 days |
NIBOR | 5.15% |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 112,000 | kr 1,000,000
Derivative, Basis Spread on Variable Rate | 5.15% | 5.15%
Fixed Rate Payable | 5.74% | 5.74%
Fair Value / Carrying Amount of Asset (Liability) $ | $ 5,806 |
Weighted- Average Remaining Term (Years) | 4 years 2 months 12 days |

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