(7) Leases

The Company and its subsidiaries currently lease various facilities and equipment under a number of cancelable and noncancelable operating leases. Lease agreements for barges have terms from one to 12 years expiring at various dates through 2020. Lease agreements for towing vessels chartered by the Company have terms from 30 days to five years expiring at various dates through 2018; however, approximately half of the towing vessel charter agreements are for terms of one year or less. Total rental expense for the years ended December 31, 2014, 2013 and 2012 was as follows (in thousands):

	2014		2013		2012
Rental expense:
Marine equipment — barges	$	19,780	$	20,841	$	23,835
Marine equipment — towing vessels		136,331		124,877		97,428
Other buildings and equipment		9,146		10,298		9,952
Rental expense	$	165,257	$	156,016	$	131,215

Future minimum lease payments under operating leases that have initial or remaining noncancelable lease terms in excess of one year at December 31, 2014 were as follows (in thousands):

	Land, Buildings		Marine Equipment
	And Equipment		Barges		Towing Vessels		Total
2015	$	7,716	$	13,930	$	89,491	$	111,137
2016		6,351		8,872		35,656		50,879
2017		5,761		7,473		17,746		30,980
2018		5,104		6,594		4,212		15,910
2019		3,523		3,567		—		7,090
Thereafter		15,358		2,239		—		17,597
	$	43,813	$	42,675	$	147,105	$	233,593