Vessels (Tables)

12 Months Ended

Dec. 31, 2018

Property Plant And Equipment [Abstract]

Schedule of Vessels

December 31, 2018	Cost		Accumulated depreciation		Net book value
Vessels	$	8,004,011	$	2,077,737	$	5,926,274

December 31, 2017	Cost		Accumulated depreciation		Net book value
Vessels	$	6,116,091	$	1,725,237	$	4,390,854
Vessels under construction		146,362		—		146,362
Vessels	$	6,262,453	$	1,725,237	$	4,537,216