Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Schedule of rent expense associated with operating leases

The table below presents rent expenses associated with operating leases for the past three years (in thousands):

2012		2011		2010
$	59,873	$	62,099	$	64,995

Future minimum lease payments related to non-cancelable operating leases

The table below sets forth the approximate future minimum lease payments as of December 31, 2012 related to non-cancelable operating leases and the non-cancelable portion of certain vehicle operating leases with initial terms of one year or more (in thousands):

2013	$	42,250
2014	33,913
2015	26,811
2016	19,903
2017	11,681
Thereafter	12,140