Fair Value of Assets and Liabilities (FV on recurring or nonrecurring basis-level 3 inputs) (Details 3) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Interest Rate Lock Commitments | Pricing Model
Level 3 Assets and Liabilities, Fair Value and Fair Value Unobservable Inputs
Weighted Average Closing Ratio (as a percent)	92.89%	92.26%
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	$ 1,039	$ 1,067
Interest Rate Swap Agreements | Discounted Cash Flow
Level 3 Assets and Liabilities, Fair Value and Fair Value Unobservable Inputs
Weighted Average Credit Factor (as a percent)	0.25%	0.13%
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	$ 330	$ (14)
Mortgage Servicing Rights | Discounted Cash Flow
Level 3 Assets and Liabilities, Fair Value and Fair Value Unobservable Inputs
Weighted Average Constant Prepayment Rate (as a percent)	8.60%	8.13%
Weighted Average Discount Rate (as a percent)	8.87%	9.33%
Mortgage Servicing Rights, at Fair Value	$ 27,027	$ 26,803