Property and Equipment, Net
|12 Months Ended|
Dec. 31, 2017
|Property Plant And Equipment [Abstract]|
|Property and Equipment, Net||
Property and equipment, net consisted of the following (in thousands):
The increase in ships was primarily due to the addition of Norwegian Joy. Depreciation and amortization expense for the years ended December 31, 2017, 2016 and 2015 was $510.0 million, $432.5 million and $432.1 million, respectively. Repairs and maintenance expenses including Dry-dock expenses were $157.2 million, $155.4 million and $124.8 million for the years ended December 31, 2017, 2016 and 2015, respectively, and were recorded within other cruise operating expense.
Ships under construction include progress payments to the shipyard, planning and design fees and other associated costs. Capitalized interest costs which were primarily associated with the construction or revitalization of ships amounted to $29.0 million, $33.7 million and $31.9 million for the years ended December 31, 2017, 2016 and 2015, respectively.
The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.
Reference 1: http://www.xbrl.org/2003/role/presentationRef