Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedule of rent expense associated with operating leases

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

2015		2014		2013
$	60,129	$	60,214	$	58,188

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, 2015 related to non-cancelable facility operating leases and the non-cancelable portion of certain equipment operating leases with initial terms of one year or more (in thousands):

2016	$	41,045
2017	37,961
2018	30,007
2019	23,278
2020	17,036
Thereafter	20,335