Goodwill And Other Intangible Assets (Schedule Of Definite-Lived Intangible Assets) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Gross Carrying Amount	$ 47,110	$ 39,744
Accumulated Amortization	18,976	16,585
Net Carrying Amount	28,134	23,159
Core Deposit Intangibles [Member]
Gross Carrying Amount	45,406	39,399
Accumulated Amortization	18,752	16,424
Net Carrying Amount	26,654	22,975
Customer Relationship Intangible Asset [Member]
Gross Carrying Amount	1,348
Accumulated Amortization	23
Net Carrying Amount	1,325
Mortgage Servicing Rights [Member]
Gross Carrying Amount	356	345
Accumulated Amortization	201	161
Net Carrying Amount	$ 155	$ 184

Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph a(1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275

Name:	us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant