Commitments And Contingent Liabilities (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments And Contingent Liabilities [Abstract]
Rental expense under leases for equipment and premises	$ 957,000	$ 953,000	$ 1,100,000
Rental income under leases	773,000	776,000	810,000
Limit on stop-loss insurance	1 year
Stop-loss insurance limit per covered individual per year	100,000
Stop-loss insurance limit on all medical claims by individual	$ 1,000,000