Commitments And Contingent Liabilities (Litigation) (Details) (USD $) In Thousands, unless otherwise specified	Aug. 13, 2012
Probable Loss [Member]
Loss Contingencies [Line Items]
Accrued liability for litigation contingencies	$ 2,322
Probable Loss [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss contingencies minimum	2,322
Loss contingencies maximum	5,472
Reasonably Possible Loss [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss contingencies minimum	2,160
Loss contingencies maximum	$ 10,575