Derivative Financial Instruments Schedule of Asset and Liability Derivatives (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Asset Derivatives
Derivative assets	$ 14,114	$ 11,698
Liability Derivatives
Derivative liabilities	4,561	2,985
Credit Risk Contract [Member]
Asset Derivatives
Derivative assets	10,193	10,833
Foreign Exchange Contract [Member]
Asset Derivatives
Derivative assets	706
Liability Derivatives
Derivative liabilities	706
Interest Risk, Interest Rate Lock Commitments [Member]
Asset Derivatives
Derivative assets	2,364	89
Interest Risk, Forward Delivery Contracts [Member]
Asset Derivatives
Derivative assets	766	776
Liability Derivatives
Derivative liabilities	137
Interest Risk, TBA Mortgage Backed Securities [Member]
Asset Derivatives
Derivative assets	85
Liability Derivatives
Derivative liabilities	501	72
Interest Risk, Interest Rate Swaps [Member]
Liability Derivatives
Derivative liabilities	3,217	2,913
Interest Rate Contract [Member]
Asset Derivatives
Derivative assets	3,215	865
Liability Derivatives
Derivative liabilities	$ 3,855	$ 2,985