Annual report pursuant to Section 13 and 15(d)

Property and Equipment, Net (Detail Textuals)

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Property and Equipment, Net (Detail Textuals) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property Plant And Equipment [Abstract]      
Depreciation and amortization expense $ 432,495 $ 432,114 $ 273,147
Repairs and maintenance expenses including Dry-docking expenses 155,400 124,800 69,900
Interest costs capitalized $ 33,700 $ 31,900 $ 22,000