LEASE OBLIGATIONS (Tables)

12 Months Ended

Dec. 31, 2012

Operating leases, which are charged to operating expense, consist principally of leases of office space and facilities, land, railroad rights of way and a wide variety of equipment. The future minimum lease payments under these operating leases are estimated to be as follows:

	(In Thousands)
2013	$	4,591
2014		3,686
2015		3,181
2016		3,196
2017		3,189
2018-after		42,313
	$	60,156

Schedule of rental payments charged to operating expenses

Rental payments charged to operating expenses in 2012, 2011 and 2010 were as follows:

	Year Ended December 31,
	2012		2011		2010
	(In Thousands)

Rental payments	$	14,548	$	17,949	$	13,997
Less: Sublease rental payments received		241		1,148		1,120
Rental payments charged to operating expenses	$	14,307	$	16,801	$	12,877