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Fair value measurements and Hedging - Derivative Instruments (Table) (Details) | 6 Months Ended
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Jun. 30, 2020 USD ($)
ING 1 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Mar. 29, 2020
Expiry | Mar. 29, 2026
Fixed Rate | 0.70%
ING 1 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 29,960,000
ING 1 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 17,650,000
DNB [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Mar. 30, 2020
Expiry | Sep. 28, 2023
Fixed Rate | 0.637%
DNB [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 128,910,000
DNB [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 51,020,000.00
SEB 1 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Mar. 30, 2020
Expiry | Sep. 28, 2023
Fixed Rate | 0.632%
SEB 1 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 51,570,000
SEB 1 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 20,410,000
ING 2 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Apr. 02, 2020
Expiry | Oct. 02, 2025
Fixed Rate | 0.70%
ING 2 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 19,690,000
ING 2 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 9,840,000
ING 3 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Apr. 02, 2020
Expiry | Oct. 02, 2025
Fixed Rate | 0.70%
ING 3 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 19,690,000
ING 3 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 9,840,000
ING 4 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Apr. 03, 2020
Expiry | Apr. 03, 2023
Fixed Rate | 0.675%
ING 4 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 16,160,000
ING 4 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 12,740,000
SEB 2 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Apr. 30, 2020
Expiry | Jan. 30, 2025
Fixed Rate | 0.727%
SEB 2 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 29,440,000
SEB 2 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 19,250,000
SEB 3 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Apr. 30, 2020
Expiry | Jan. 30, 2025
Fixed Rate | 0.727%
SEB 3 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 29,440,000
SEB 3 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 19,250,000
Citi 1 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Jul. 30, 2020
Expiry | Oct. 18, 2023
Fixed Rate | 0.33%
Citi 1 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 104,450,000
Citi 1 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 60,650,000
Citi 2 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Aug. 10, 2020
Expiry | May 10, 2024
Fixed Rate | 0.351%
Citi 2 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 56,070,000.00
Citi 2 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 37,910,000
Citi 3 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Jun. 22, 2020
Expiry | Dec. 20, 2023
Fixed Rate | 0.338%
Citi 3 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 94,540,000
Citi 3 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 51,250,000
Citi 4 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Jun. 29, 2020
Expiry | Aug. 28, 2023
Fixed Rate | 0.328%
Citi 4 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 56,915,000
Citi 4 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 31,235,000
Citi 5 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Jul. 21, 2020
Expiry | Jul. 21, 2023
Fixed Rate | 0.325%
Citi 5 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 99,815,000
Citi 5 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 75,420,000
Citi 6 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Aug. 28, 2020
Expiry | May 28, 2024
Fixed Rate | 0.352%
Citi 6 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 31,350,000
Citi 6 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 21,130,000
Citi 7 [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Inception | Sep. 01, 2020
Expiry | Mar. 01, 2024
Fixed Rate | 0.343%
Citi 7 [Member] | Maximum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 33,390,000
Citi 7 [Member] | Minimum [Member] |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
Amortizing Notional amount | $ 25,350,000

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