Commitments And Contingencies (Schedule Of Future Minimum Rental Payments And Receipts For Leases) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Commitments And Contingencies [Abstract]
Rental Payments, 2012	$ 18,929
Rental Payments, 2013	18,148
Rental Payments, 2014	16,679
Rental Payments, 2015	15,565
Rental Payments, 2016	14,977
Rental Payments, Thereafter	79,255
Rental Payments, Total	163,553
Rental Receipts, 2012	658
Rental Receipts, 2013	456
Rental Receipts, 2014	339
Rental Receipts, 2015	253
Rental Receipts, 2016	315
Rental Receipts, Total	$ 2,021

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The total of future contractually required payments on leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within one year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fifth year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the second year of the balance sheet date relating to leases defined as operating.

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Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Number 13

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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