Commitments and Contingent Liabilities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense	$ 80,350	$ 76,529	$ 65,080
Accrual for Environmental Loss Contingencies	28,875	19,584
Loss Contingency Accrual, at Carrying Value	1,158	1,246
Leases, Operating [Abstract]
Operating Lease 2013	63,228
Operating Lease 2014	51,064
Operating Lease 2015	36,470
Operating Lease 2016	25,369
Operating Lease 2017	21,837
Operating Lease 2018 and thereafter	73,537
Leases, Capital [Abstract]
Capital Lease 2013	2,552
Capital Lease 2014	1,809
Capital Lease 2015	835
Capital Lease 2016	618
Capital Lease 2017	237
Capital Lease 2018 and thereafter	$ 788