Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum lease payments under noncancelable operating leases

As of December 31, 2018, future minimum lease payments under noncancelable operating leases were as follows (in thousands):

Year
2019	$	67,682
2020	64,237
2021	56,142
2022	52,759
2023	52,522
Thereafter	383,974
	$	677,316

Schedule of future commitments to pay for usage of port facilities, marine consumables, services and maintenance contracts

At December 31, 2018, we have future commitments to pay for our usage of certain port facilities, marine consumables, services and maintenance contracts as follows (in thousands):

Year
2019	$	224,253
2020	184,308
2021	136,917
2022	79,401
2023	45,266
Thereafter	149,696
	$	819,841