Derivative Financial Instruments (Fair Value Hedge) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Feb. 05, 2016	Jun. 30, 2015
Derivative [Line Items]
Cash pledged as collateral	$ 2,200,000	$ 5,300,000
Other Liabilities
Derivative [Line Items]
Notional amount			$ 2,000,000.0
Fair Value Hedging | Other Liabilities
Derivative [Line Items]
Notional amount	40,807,000	13,805,000
Fair Value	(1,626,000)	(621,000)
Fair Value Hedging | Interest income
Derivative [Line Items]
Amount of Gain (Loss)	(1,005,000)	$ (621,000)
Fair Value Hedging | Interest Rate Swap
Derivative [Line Items]
Fixed interest rate on derivative (as a percent)				3.40%
Basis spread on variable rate (as a percent)				0.88%
Notional amount				$ 13,800,000
Cash pledged as collateral	$ 5,000,000