Lease Commitments (Schedule Of Future Minimum Rental Payments Under Lease Commitments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Lease Commitments [Abstract]
Capital Leases, 2012	$ 2,425
Capital Leases, 2013	2,277
Capital Leases, 2014	1,299
Capital Leases, 2015	1,212
Capital Leases, 2016	1,077
Capital Leases, Later years	7,787
Capital Leases, Total minimum rental	16,077
Less: Amount representing interest	(6,095)
Present value of minimum rental commitments	9,982
Less: Current portion of capital lease obligations	(1,680)
Long-term portion of capital lease obligations	8,302
Operating Leases, 2012	58,388
Operating Leases, 2013	42,717
Operating Leases, 2014	32,777
Operating Leases, 2015	26,806
Operating Leases, 2016	21,687
Operating Leases, Later years	24,053
Operating Leases, Total minimum rental	$ 206,428