Derivatives and Hedging Activities (Textual) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, Net Liability Position, Aggregate Fair Value	$ 10,500,000		$ 10,500,000		$ 12,800,000
Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge			5 years
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			$ 103,000
Gain (Loss) on Sales of Loans, Net	1,400,000	$ 1,700,000	3,400,000	$ 3,900,000
Exposure to Institutional Counterparties	4,100,000		4,100,000		4,700,000
Amortization Of Deferred Hedge Gains Losses	61,000	61,000	183,000	183,000
Notional amount of fair value hedged derivative	0		0
Customer related positions	14,700,000		14,700,000		16,100,000
Change in Fair Value on Loans Held for Sale	(108,000)	$ 47,000	(102,000)	$ 60,000
Derivative, Notional Amount	$ 100,000,000		$ 100,000,000		$ 75,000,000