Derivatives and Hedging Activities (Textual) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Derivative [Line Items]
Derivative, Net Liability Position, Aggregate Fair Value	$ 106,000		$ 106,000		$ 4,200,000
Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge			5 years
Gain (Loss) on Sales of Loans, Net	755,000	$ 977,000	$ 1,500,000	$ 2,000,000
Exposure to Institutional Counterparties	23,200,000		23,200,000		7,100,000
Amortization Of Deferred Hedge Gains Losses	61,000	61,000	122,000	122,000
Customer related positions	2,400,000		2,400,000		9,500,000
Notional amount of fair value hedged derivative	0		0		$ 0
Change in Fair Value on Loans Held for Sale	$ 70,000	$ 153,000	44,000	$ 6,000
Interest Income [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			77,000
Interest Expense [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			$ 822,000