Crystal Cruise Lines, most commonly referred to as Crystal Cruises, is an American luxury cruise line with its headquarters in Los Angeles in the United States. The line was established in 1988 as a wholly owned subsidiary of the large Japanese shipping company Nippon Yusen Kaisha (NYK). Condé Nast Traveler magazine speaks highly of Crystal Cruise Lines, voting it Best Midsize Cruise Ship Line. The cruises offered by Crystal Cruises include an annual World Cruise on the Crystal Serenity of about 110 days in length. In March 2015, NYK announced that it was selling Crystal Cruises to Genting Hong Kong (GHK), the owner of Star Cruises and a major shareholder in Norwegian Cruise Line Holdings. The transfer was expected to close within the second quarter of 2015.