Derivatives (Offsetting Derivatives Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Derivative Liabilities
Total liability derivatives	$ 95,103	$ 41,514
Interest Rate Swap
Derivative Liabilities
Derivative liabilities, gross amounts of recognized liabilities	87,545	40,238
Derivative liability, fair value, gross asset	0	0
Total liability derivatives	87,545	40,238
Derivative Liability, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative liabilities, gross amounts not offset in the statement of financial position, financial instruments	(1,223)	(198)
Derivative liabilities, gross amounts not offset in the statement of financial position, collateral posted	(86,322)	(40,040)
Derivative liabilities, net amount	0	0
Foreign Exchange Contract
Derivative Liabilities
Derivative liabilities, gross amounts of recognized liabilities	334	305
Derivative liability, fair value, gross asset	0	0
Total liability derivatives	334	305
Derivative Liability, Fair Value, Amount Not Offset Against Collateral [Abstract]
Derivative liabilities, gross amounts not offset in the statement of financial position, financial instruments	0	0
Derivative liabilities, gross amounts not offset in the statement of financial position, collateral posted	0	0
Derivative liabilities, net amount	$ 334	$ 305