Commitments and Contingent Liabilities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]
Rent expense for operating leases	$ 91,209	$ 80,350	$ 76,529
Accrual for environmental loss contingencies	30,302	28,875
Leases, Operating [Abstract]
Operating Lease 2014	77,344
Operating Lease 2015	59,647
Operating Lease 2016	43,982
Operating Lease 2017	36,609
Operating Lease 2018	32,492
Operating Lease 2019 and thereafter	97,609
Leases, Capital [Abstract]
Capital Lease 2014	5,793
Capital Lease 2015	1,945
Capital Lease 2016	781
Capital Lease 2017	240
Capital Lease 2018	126
Capital Lease 2019 and thereafter	531
Operating Leases, Future Minimum Payments Due	347,683
Capital Leases, Future Minimum Payments Due	$ 9,416