Derivatives (Derivative Instruments Consolidated Statement) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Trading Activity, Gains and Losses, Net [Line Items]
Included in Interest Income / (Expense)	$ 18,859	$ 18,791	$ 56,114	$ 55,308
Interest Rate Swap
Trading Activity, Gains and Losses, Net [Line Items]
Included in Interest Income / (Expense)	0	0	0	0
Included in Other Income / (Expense)	$ 179	$ (4)	$ 344	$ 74