Derivatives and Hedging Activities (Textual) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Derivative [Line Items]
Derivative, Net Liability Position, Aggregate Fair Value	$ 24,700,000		$ 24,700,000		$ 176,000
Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge	4 years 9 months 18 days
Gain (Loss) on Sales of Loans, Net	$ 3,300,000	$ 755,000	4,000,000.0	$ 1,500,000
Exposure to Institutional Counterparties	26,500,000		26,500,000		18,400,000
Amortization Of Deferred Hedge Gains Losses	0	61,000	0	122,000
Customer related positions	50,600,000		50,600,000		6,400,000
Notional amount of fair value hedged derivative	0		0		$ 0
Change in Fair Value on Loans Held for Sale	$ 919,000	$ 70,000	$ 920,000	$ 44,000
Interest rate collars on loans [Member]
Derivative [Line Items]
Derivative, Average Cap Interest Rate	2.87%		2.87%		3.02%
Derivative, Average Floor Interest Rate	2.32%		2.32%		2.51%
Derivative, Notional Amount	$ 350,000,000		$ 350,000,000		$ 250,000,000
Interest Income [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	4,300,000
Interest Expense [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 343,000