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Loans (Loans, Net of Unearned Income) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 16,752,151 | $ 15,703,314
Total Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 12,545,507 | 11,560,325
Residential Mortgages [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 2,146,713 | 2,049,524
Consumer [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 2,059,931 | 2,093,465
Commercial Real Estate - Income Producing [Member] | Total Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 2,013,890 | 1,553,082
Construction and Land Development [Member] | Total Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 1,010,879 | 1,151,950
Total Commercial & Industrial [Member] | Total Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 9,520,738 | 8,855,293
Total Commercial & Industrial [Member] | Commercial Non-Real Estate [Member] | Total Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 7,613,917 | 6,995,824
Total Commercial & Industrial [Member] | Commercial Real Estate - Owner Occupied [Member] | Total Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 1,906,821 | $ 1,859,469

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- Definition Amount before allowance and deduction of deferred interest and fees, unamortized costs and premiums over and discounts from face amounts, of loans and leases held in portfolio, including loans and leases covered under loss sharing agreements. + References No definition available. + Details
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