Derivative Financial Instruments (Fair Value of Derivatives by Balance Sheet Location) (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Total derivative assets	[1]	$ 12,709	$ 5,807
Total derivative liabilities	[2]	13,876	7,316
Other assets [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets		12,709	5,807
Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Total derivative liabilities		13,876	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		88	497
Not Designated as Hedging Instrument [Member] | Interest Rate Commitments [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated		2,194	1,212
Not Designated as Hedging Instrument [Member] | Interest Rate Commitments [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated		0	20
Not Designated as Hedging Instrument [Member] | Commitments to sell mortgage loans [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated		0	13
Not Designated as Hedging Instrument [Member] | Commitments to sell mortgage loans [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated		3,014	2,028
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated		10,436	4,554
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated		0	23
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated		0	28
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated		10,742	4,748
Not Designated as Hedging Instrument [Member] | Risk participation-out agreement [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated		79	0
Not Designated as Hedging Instrument [Member] | Risk participation-in agreement [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated		$ 32	$ 0

[1] Derivative assets include interest rate swaps contracts with customers, risk participation-out agreements and forward loan commitments and are included in other assets in the Consolidated Balance Sheets.

[2] Derivative liabilities include mirror swaps with counterparties, risk participation-in agreements, interest rate risk management contracts and forward loan commitments and are included in other liabilities in the Consolidated Balance Sheets.