Derivative Financial Instruments and Hedging Activities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional amount	$ 60,000,000	$ 60,000,000	$ 60,000,000	$ 60,000,000
Weighted average pay rate	1.26%	1.26%	1.26%	1.26%
Weighted average receive rate	1.94%	1.07%	1.58%	0.98%
Weighted average maturity	2 years 4 months 13 days	3 years 4 months 10 days	2 years 7 months 10 days	3 years 7 months 10 days
Unrealized gain (loss) relating to interest rate swaps	$ 82,000	$ 312,000	$ 665,000	$ (231,000)