Six Months Ended June 30, 2022 Compared with the Six Months Ended June 30, 2021
| | | | | | | | | | | | |
| | Six Months Ended | | | | | | |
| | June 30, | | | | | | |
(U.S. Dollars in thousands) | | 2022 | | 2021 | | Change | | % Change | |
Time charter and bareboat revenues | | $ | 128,975 | | $ | 132,111 | | $ | (3,136) | | (2) | % |
Loss of hire insurance recoveries | | | — | | | 10,279 | | | (10,279) | | (100) | % |
Other income | | | 180 | | | 28 | | | 152 | | 543 | % |
Vessel operating expenses | | | 43,085 | | | 35,954 | | | 7,131 | | 20 | % |
Depreciation | | | 51,996 | | | 47,515 | | | 4,481 | | 9 | % |
Impairment | | | — | | | 29,421 | | | (29,421) | | (100) | % |
General and administrative expenses | | | 3,126 | | | 3,113 | | | 13 | | 0 | % |
Interest income | | | 61 | | | — | | | 61 | | (100) | % |
Interest expense | | | (15,026) | | | (14,176) | | | 850 | | 6 | % |
Other finance expense | | | (312) | | | (409) | | | (97) | | (24) | % |
Realized and unrealized gain (loss) on derivative instruments | | | 21,473 | | | 5,746 | | | (15,727) | | 274 | % |
Net gain (loss) on foreign currency transactions | | | (98) | | | (96) | | | 2 | | 2 | % |
Income tax benefit (expense) | | | (378) | | | (264) | | | 114 | | 43 | % |
Net income | | | 36,668 | | | 17,216 | | | 19,452 | | 113 | % |
Time charter and bareboat revenues: Time charter and bareboat revenues decreased by $3.1 million to $129.0 million for the six months ended June 30, 2022, compared to $132.1 million for the six months ended June 30, 2021. This was mainly due to increased off hire in connection with scheduled drydocks in the first half of 2022.
Loss of hire insurance recoveries: Loss of hire insurance recoveries for the six months ended June 30, 2022, were $nil compared to $10.3 million for the six months ended June 30, 2021. The loss of hire insurance recoveries for the six months ended June 30, 2021, were related to the Windsor Knutsen in connection with repairs to her main engine block. The Windsor Knutsen was off hire from December 12, 2020 to June 10, 2021, for repairs. For the six months ended June 30, 2021, the Partnership recorded $8.7 million in loss of hire recoveries with respect to the Windsor Knutsen. In addition, the Tove Knutsen reported a leakage from its controllable pitch propeller and as a result the vessel was off hire from March 1, 2021 to April 15, 2021 for repairs. For the six months ended June 30, 2021, the Partnership recorded $1.5 million in loss of hire recoveries with respect to the Tove Knutsen.
Other income: Other income for the six months ended June 30, 2022 was $180,000 compared to $28,000 for the six months ended June 30, 2021.
Vessel operating expenses: Vessel operating expenses for the six months ended June 30, 2022 were $43.1 million, an increase of $7.1 million from $36.0 million in the six months ended June 30, 2021. The increase is mainly related to bunker costs for the Windsor Knutsen, the Lena Knutsen, the Anna Knutsen and the Vigdis Knutsen in connection with their voyages to drydock and increased crewing and logistics costs.
Depreciation: Depreciation expense for the six months ended June 30, 2022 was $52.0 million, an increase of $4.5 million from $47.5 million in the six months ended June 30, 2021. The increase is mainly related to the change by the Partnership of the useful life estimate of each of the vessels in its fleet from 25 years to 23 years due to prevailing longer-term market trends, which increased the non-cash accounting depreciation charge starting July 1, 2021.
Impairment: Impairment charge for the six months ended June 30, 2022, were $nil compared to $29.4 million for the six months ended June 30, 2021. The Impairment charge for the six months ended June 30, 2021 was related to the Windsor Knutsen. The carrying value of the Windsor Knutsen was written down to its estimated fair value, using a discounted cash flow valuation.
General and administrative expenses: General and administrative expenses for the six months ended June 30, 2022 were $3.1 million, compared to $3.1 million for the six months ended June 30, 2021.
Interest income: Interest income for the six months ended June 30, 2022 was $61,000 compared to $nil for the six months ended June 30, 2021. The increase is mainly due to increased interest rates on our bank deposits.
Interest expense: Interest expense for the six months ended June 30, 2022 was $15.0 million, an increase of $0.8 million from $14.2 million in the six months ended June 30, 2021. The increase was mainly due to an increase in the US dollar LIBOR rate.