Derivative Financial Instruments (Fair Value of Derivatives by Balance Sheet Location) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Total derivative assets	$ 9,245us-gaap_DerivativeAssets	$ 5,807us-gaap_DerivativeAssets
Total derivative liabilities	11,041us-gaap_DerivativeLiabilities	7,316us-gaap_DerivativeLiabilities
Other assets [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets	9,245	5,807
Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Total derivative liabilities	11,041	7,316
Derivatives Designated as Cash Flow Hedging Instruments [Member] \| Interest Rate Swaps [Member] \| Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset designated as a cash flow hedge	0	0
Derivatives Designated as Cash Flow Hedging Instruments [Member] \| Interest Rate Swaps [Member] \| Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability designated as a cash flow hedge	367	497
Derivatives not Designated as Hedging Instruments [Member] \| Interest Rate Commitments [Member] \| Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated	1,769	1,212
Derivatives not Designated as Hedging Instruments [Member] \| Interest Rate Commitments [Member] \| Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated	5	20
Derivatives not Designated as Hedging Instruments [Member] \| Commitments to sell mortgage loans [Member] \| Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated	14	13
Derivatives not Designated as Hedging Instruments [Member] \| Commitments to sell mortgage loans [Member] \| Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated	2,970	2,028
Derivatives not Designated as Hedging Instruments [Member] \| Interest rate swaps with customers [Member] \| Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated	7,415	4,554
Derivatives not Designated as Hedging Instruments [Member] \| Interest rate swaps with customers [Member] \| Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated	0	23
Derivatives not Designated as Hedging Instruments [Member] \| Mirror swaps with counterparties [Member] \| Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated	0	28
Derivatives not Designated as Hedging Instruments [Member] \| Mirror swaps with counterparties [Member] \| Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated	7,699	4,748
Derivatives not Designated as Hedging Instruments [Member] \| Risk participation agreement [Member] \| Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated	$ 47	$ 0

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments.

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Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments.

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