Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance			$ 106,291	$ 78,470
Other comprehensive income (loss) before reclassification	$ 62	$ (53)	24	(246)
Less amounts reclassified from accumulated other comprehensive income (loss)	(2)	39	(14)	80
Total other comprehensive income (loss), net	64	(92)	38	(326)
Ending Balance	112,447	84,967	112,447	84,967
Net unrealized gains (losses) on securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(247)	34	(161)	(2)
Other comprehensive income (loss) before reclassification	246	175	160	272
Less amounts reclassified from accumulated other comprehensive income (loss)	11	53	11	114
Total other comprehensive income (loss), net	235	122	149	158
Ending Balance	(12)	156	(12)	156
Adjustments related to defined benefit plan
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(379)	(428)	(391)	(448)
Other comprehensive income (loss) before reclassification	0	0	0	0
Less amounts reclassified from accumulated other comprehensive income (loss)	(13)	(14)	(25)	(34)
Total other comprehensive income (loss), net	13	14	25	34
Ending Balance	(366)	(414)	(366)	(414)
Net unrealized gains (losses) from cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	760	(307)	712	(17)
Other comprehensive income (loss) before reclassification	(184)	(228)	(136)	(518)
Less amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Total other comprehensive income (loss), net	(184)	(228)	(136)	(518)
Ending Balance	576	(535)	576	(535)
Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	134	(701)	160	(467)
Total other comprehensive income (loss), net			38	(326)
Ending Balance	$ 198	$ (793)	$ 198	$ (793)