Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 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	$ (14)	$ 62	(46)	24
Less amounts reclassified from accumulated other comprehensive income (loss)	(9)	(2)	125	(14)
Total other comprehensive income (loss), net	(5)	64	(171)	38
Ending Balance	128,141	112,447	128,141	112,447
Net unrealized (losses) gains on securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(916)	(247)	(335)	(161)
Other comprehensive (loss) income before reclassification	(73)	246	(654)	160
Less amounts reclassified from accumulated other comprehensive income (loss)	6	11	6	11
Total other comprehensive income (loss), net	(79)	235	(660)	149
Ending Balance	(995)	(12)	(995)	(12)
Adjustments related to defined benefit plan
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(475)	(379)	(341)	(391)
Other comprehensive (loss) income before reclassification	0	0	0	0
Less amounts reclassified from accumulated other comprehensive income (loss)	(15)	(13)	119	(25)
Total other comprehensive income (loss), net	15	13	(119)	25
Ending Balance	(460)	(366)	(460)	(366)
Net unrealized gains from cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	1,431	760	882	712
Other comprehensive (loss) income before reclassification	59	(184)	608	(136)
Less amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Total other comprehensive income (loss), net	59	(184)	608	(136)
Ending Balance	1,490	576	1,490	576
Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	40	134	206	160
Total other comprehensive income (loss), net			(171)	38
Ending Balance	0	$ 198	0	$ 198
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	$ 35		$ 35