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Leases-The Company as Lessee
12 Months Ended
Dec. 31, 2014
Leases [Abstract]  
Leases - The Company as Lessee
LEASES—THE COMPANY AS LESSEE
Principal non-cancelable operating leases include land, office space, harbors and equipment leased for periods that expire through 2043. Management expects that in the normal course of business, most operating leases will be renewed or replaced by other similar leases. Rental expense under operating leases totaled $6.7 million, $4.5 million and $3.5 million for 2014, 2013 and 2012, respectively. Rental expense for operating leases that provide for future escalations are accounted for on a straight-line basis.
Future minimum payments under non-cancelable operating leases were as follows (in millions):
Years Ending December 31,
 
Minimum Lease Payments
2015
 
$
5.6

2016
 
5.4

2017
 
5.4

2018
 
4.7

2019
 
3.9

Thereafter
 
20.1

Total
 
$
45.1