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Leases
12 Months Ended
Dec. 31, 2012
Leases [Abstract]  
Leases
Leases

Rental expense for operating leases was $14.3 million, $14.5 million, and $14.2 million for the years ended December 31, 2012, 2011, and 2010, respectively. Sublease rental income was not material in any of the periods presented.

As of December 31, 2012, our minimum lease payment requirements for noncancelable operating leases with remaining terms of more than one year are as follows (in thousands):
2013
 
$
12,346

2014
 
11,613

2015
 
10,919

2016
 
9,061

2017
 
8,520

Thereafter
 
36,723

Total
 
$
89,182



These future minimum lease payment requirements have not been reduced by sublease rentals due in the future under noncancelable subleases. Minimum sublease income expected to be received in the future is not material.