Contingencies And Commitments (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Contingencies, Commitments And Guarantees [Line Items]
Aggregate notional value standby letters of credit	50,310
Minimum [Member]
Contingencies, Commitments And Guarantees [Line Items]
Expiration period, minimum in months and maximum in years	1 month
Maximum [Member]
Contingencies, Commitments And Guarantees [Line Items]
Expiration period, minimum in months and maximum in years	5 years