Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance			$ 118,105	$ 106,291
Other comprehensive (loss) income before reclassification	$ (216)	$ (45)	(262)	(21)
Less amounts reclassified from accumulated other comprehensive income (loss)	(13)	22	112	8
Total other comprehensive income (loss), net	(203)	(67)	(374)	(29)
Ending Balance	133,067	115,814	133,067	115,814
Net unrealized (losses) gains on securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(995)	(12)	(335)	(161)
Other comprehensive (loss) income before reclassification	(211)	(73)	(865)	87
Less amounts reclassified from accumulated other comprehensive income (loss)	2	34	8	45
Total other comprehensive income (loss), net	(213)	(107)	(873)	42
Ending Balance	(1,208)	(119)	(1,208)	(119)
Adjustments related to defined benefit plan
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(460)	(366)	(341)	(391)
Other comprehensive (loss) income before reclassification	0	0	0	0
Less amounts reclassified from accumulated other comprehensive income (loss)	(15)	(12)	104	(37)
Total other comprehensive income (loss), net	15	12	(104)	37
Ending Balance	(445)	(354)	(445)	(354)
Net unrealized gains (losses) from cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	1,490	576	882	712
Other comprehensive (loss) income before reclassification	(5)	28	603	(108)
Less amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Total other comprehensive income (loss), net	(5)	28	603	(108)
Ending Balance	1,485	604	1,485	604
Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	35	198	206	160
Total other comprehensive income (loss), net			(374)	(29)
Ending Balance	(203)	$ 131	(203)	$ 131
Accounting Standards Update 2016-01 And 2018-02
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Reclassification to retained earnings	35		35
Accounting Standards Update 2016-01 And 2018-02 | Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending Balance	$ (168)		$ (168)