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Loans and Leases (Loans Acquired By Loan Class) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | $ 996,280 | $ 1,029,426
Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 702,761 | 781,307
Commercial | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 59,808 | 78,915
Commercial | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 579,435 | 642,891
Commercial | Other commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 36,043 | 41,381
Commercial | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 25,813 | 17,254
Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 1,662 | 866
Noncommerical |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 293,519 | 248,119
Noncommerical | Mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 240,681 | 213,851
Noncommerical | Revolving mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 50,048 | 30,834
Noncommerical | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | 1,144 | 2,583
Noncommerical | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Acquired | $ 1,646 | $ 851

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