Contingencies And Commitments (Standby Letters Of Credit Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Contingencies, Commitments And Guarantees [Line Items]
Total	$ 50,310
0-12 months [Member]
Contingencies, Commitments And Guarantees [Line Items]
Total	39,376
Greater than 12 months [Member]
Contingencies, Commitments And Guarantees [Line Items]
Total	$ 10,934

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant