Derivatives and Hedging Activities Non-designated Hedges Text description (Details) - Not Designated as Hedging Instrument [Member] $ in Millions	Mar. 31, 2016 USD ($) contracts	Dec. 31, 2015 USD ($) contracts
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held | contracts	100	76
Derivative, Notional Amount	$ 672.7	$ 475.3
Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held | contracts	1	0
Derivative, Notional Amount	$ 0.1
Loan Participations and Assignments [Member]
Derivative [Line Items]
Derivative, Notional Amount	8.3	$ 8.3
Other Contract [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held | contracts		0
Derivative, Notional Amount	$ 1.9