Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum lease payments under noncancelable operating leases

As of December 31, 2014, future minimum lease payments under noncancelable operating leases were as follows (in thousands):

Year
2015	$	18,154
2016	16,279
2017	12,471
2018	9,919
2019	7,699
Thereafter	124,997
	$	189,519

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

At December 31, 2014, we have future commitments to pay for our usage of certain port facilities, marine consumables, services and maintenance contracts as follows (in thousands):

Year
2015	$	214,817
2016	149,336
2017	154,253
2018	82,010
2019	115,002
Thereafter	127,843
	$	843,261