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