Regulatory And Capital Requirements (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2011 Trust Preferred Securities [Member]	Dec. 31, 2010 Trust Preferred Securities [Member] Parent Company [Member]
Schedule of Capitalization, Equity [Line Items]
Tier one risk-based capital to be well capitalized under prompt corrective action provision, ratio	6.00%
Risk-based capital to be well capitalized under prompt corrective action provision, ratio	10.00%
Tier one leverage capital to be well capitalized under prompt corrective action provision, ratio	5.00%
Tier one capital		$ 176.3	$ 176.3

The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action.

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

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Chapter 17

-Paragraph 15

-Subparagraph 3a

-IssueDate 2006-05-01

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Chapter 17

-Paragraph 22

-IssueDate 2006-05-01

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Name:	us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant