Stock Compensation Plans (Historical Vesting Of TSR Performance Stock Awards) (Details)	12 Months Ended
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued	8,528
2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
TSR Performance Period	2006-2008
Payout Level	200.00%
Shares Issued	128,800
2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
TSR Performance Period	2007-2009
Payout Level	200.00%
Shares Issued	107,900
2011 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
TSR Performance Period	2008-2010
Payout Level	97.00%
Shares Issued	16,781

The number of shares newly issued during the reporting period under the plan.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 65

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration