Derivative Financial Instruments (Fair Value of Derivatives by Balance Sheet Location) (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Total derivative assets	[1]	$ 19,266	$ 9,490
Total derivative liabilities	[2]	20,452	10,347
Other assets [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets		19,266	9,490
Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Total derivative liabilities		20,452	10,347
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest Rate Cap [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset designated as a cash flow hedge		83	187
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest Rate Cap [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability designated as a cash flow hedge		0	0
Not Designated as Hedging Instrument [Member] | Interest Rate Commitments [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated		2,466	1,220
Not Designated as Hedging Instrument [Member] | Interest Rate Commitments [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated		1	0
Not Designated as Hedging Instrument [Member] | Commitments to sell mortgage loans [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated		1	0
Not Designated as Hedging Instrument [Member] | Commitments to sell mortgage loans [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated		3,020	2,012
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated		16,616	8,027
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	0
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated		0	0
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated		17,314	8,266
Not Designated as Hedging Instrument [Member] | Risk participation-out agreement [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative asset not designated		100	56
Not Designated as Hedging Instrument [Member] | Risk participation-in agreement [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liability not designated		$ 117	$ 69

[1] Derivative assets include interest rate risk management agreements, interest rate swap 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 and forward loan commitments and are included in other liabilities in the Consolidated Balance Sheets.