CAIRO (Reuters) -The operator of a giant cargo ship that blocked the Suez Canal in March said on Thursday that it would take more time for the vessel to be released from detainment while a final agreement with Egyptian authorities was being concluded. The Japanese owners and insurers of the ship were locked in a compensation dispute with the Suez Canal Authority (SCA), but announced on Wednesday that an agreement in principle had been reached. "It may take some further time for the agreement to be concluded, for the vessel to be released from arrest and prepared for onward transit," ship opera...