Derivatives (Schedule Of Interest Rate Swaps) (Details) (2011 Interest Rate Swap, USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
2011 Interest Rate Swap
Derivative [Line Items]
Estimated fair value of liability	$ 7,909	$ 10,398
Derivative, Notional Amount	$ 93,500	$ 93,500

Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

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