Allowance for Loan and Lease Losses (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Originated Loans and Leases [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Related Allowance	$ 10,181	$ 19,910
Average Recorded Investment With Related Allowance	1,678	453
Average Recorded Investment	11,859	20,363
Originated Loans and Leases [Member] \| Commercial and Industrial Other [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Related Allowance	786	3,047
Originated Loans and Leases [Member] \| Commercial Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Related Allowance		5,966
Originated Loans and Leases [Member] \| Commercial Real Estate Other [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Related Allowance	8,471	9,840
Average Recorded Investment With Related Allowance	1,678	453
Originated Loans and Leases [Member] \| Residential Real Estate - Home equity [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Related Allowance	924	1,057
Acquired Loans and Leases [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Related Allowance	4,381	9,281
Interest Income Recognized With No Related Allowance		5
Average Recorded Investment With Related Allowance	1,060
Average Recorded Investment	5,441	9,281
Interest Income Recognized		5
Acquired Loans and Leases [Member] \| Commercial and Industrial Other [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Related Allowance	581	1,084
Average Recorded Investment With Related Allowance	815
Acquired Loans and Leases [Member] \| Commercial Real Estate - Construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Related Allowance	373	2,028
Acquired Loans and Leases [Member] \| Commercial Real Estate Other [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Related Allowance	2,480	6,081
Interest Income Recognized With No Related Allowance		5
Average Recorded Investment With Related Allowance	245
Acquired Loans and Leases [Member] \| Residential Real Estate - Home equity [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment With No Related Allowance	$ 947	$ 88

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a 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=49124121&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=49124121&loc=d3e5212-111524

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ 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=49124121&loc=d3e5212-111524

+ Details

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- Definition

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

+ References

+ Details

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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

+ Details

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- Definition

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+ References

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