Allowance for Loan and Lease Loss and Credit Quality (Schedule Of Average Recorded Investment And Interest Income Recognized) (Details) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Average recorded investment	$ 61,321	$ 55,104
Interest income recognized	1,394	1,461
Commercial Real Estate \| Non-owner occupied term, net
Financing Receivable, Impaired [Line Items]
Average recorded investment	16,959	14,766
Interest income recognized	551	530
Commercial Real Estate \| Owner Occupied Term, net
Financing Receivable, Impaired [Line Items]
Average recorded investment	10,087	6,475
Interest income recognized	151	146
Commercial Real Estate \| Multifamily, net
Financing Receivable, Impaired [Line Items]
Average recorded investment	3,906	3,971
Interest income recognized	122	121
Commercial Real Estate \| Construction & Development, net
Financing Receivable, Impaired [Line Items]
Average recorded investment	961	1,532
Interest income recognized	22	72
Commercial Real Estate \| Residential Development, net
Financing Receivable, Impaired [Line Items]
Average recorded investment	5,816	7,666
Interest income recognized	163	315
Commercial \| Term, net
Financing Receivable, Impaired [Line Items]
Average recorded investment	17,157	16,843
Interest income recognized	330	217
Commercial \| LOC & Other, net
Financing Receivable, Impaired [Line Items]
Average recorded investment	6,287	3,851
Interest income recognized	55	60
Commercial \| Leases and Equipment Finance, net
Financing Receivable, Impaired [Line Items]
Average recorded investment	148	0
Interest income recognized	$ 0	$ 0

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Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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- Definition

Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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