Derivatives - (FV of Derivatives on the Balance Sheet) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value	$ 8,310	$ 9,528
Liability derivatives fair value	2,268	1,381
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value	2,541	2,187
Liability derivatives fair value	2,487	2,085
Other assets [Member] | Interest rate products [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value	8,310	9,528
Liability derivatives fair value	2,268	1,381
Other assets [Member] | Interest rate products [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value	2,384	1,900
Liability derivatives fair value	2,461	1,898
Other assets [Member] | Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value	143	149
Liability derivatives fair value		6
Other assets [Member] | Forward Contracts [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset derivatives fair value	14	138
Liability derivatives fair value	$ 26	$ 20