Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Rent expense for operating leases	$ 84,801	$ 87,149	$ 76,541
Accrual for environmental loss contingencies	30,595	$ 32,890
Leases, Operating [Abstract]
Operating Lease 2015	62,892
Operating Lease 2016	53,364
Operating Lease 2017	43,888
Operating Lease 2018	29,438
Operating Lease 2019	21,386
Operating Lease 2020 and thereafter	50,410
Leases, Capital [Abstract]
Capital Lease 2015	2,830
Capital Lease 2016	1,222
Capital Lease 2017	436
Capital Lease 2018	240
Capital Lease 2019	182
Capital Lease 2020 and thereafter	243
Operating Leases, Future Minimum Payments Due	261,378
Capital Leases, Future Minimum Payments Due	$ 5,153