Allowance for Loan and Lease Losses - Changes in Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 9,941	$ 10,897	$ 9,689	$ 11,708	$ 11,708
Charge-offs	(229)	(594)	(703)	(1,462)	(2,535)
Recoveries	99	319	613	956	1,264
(Credit) provision	197	(586)	409	(1,166)	(748)
Ending balance	10,008	10,036	10,008	10,036	9,689
Ending balance: related to loans individually evaluated for impairment	337	114	337	114	398
Ending balance: related to loans collectively evaluated for impairment	9,671	9,922	9,671	9,922	9,291
LHFI [Abstract]
Ending balance	547,087	447,647	547,087	447,647	499,103
Ending balance: individually evaluated for impairment	6,205	11,259	6,205	11,259	7,191
Ending balance: collectively evaluated for impairment	540,882	436,388	540,882	436,388	491,912
Commercial real estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,570	4,885	3,622	4,452	4,452
Charge-offs	0	(231)	(77)	(231)	(622)
Recoveries	8	2	184	351	380
(Credit) provision	(236)	(448)	(387)	(364)	(588)
Ending balance	3,342	4,208	3,342	4,208	3,622
Ending balance: related to loans individually evaluated for impairment	0	0	0	0	77
Ending balance: related to loans collectively evaluated for impairment	3,342	4,208	3,342	4,208	3,545
LHFI [Abstract]
Ending balance	239,776	206,139	239,776	206,139	225,679
Ending balance: individually evaluated for impairment	879	4,649	879	4,649	1,469
Ending balance: collectively evaluated for impairment	238,897	201,490	238,897	201,490	224,210
Construction and land development [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,920	1,076	1,674	2,292	2,292
Charge-offs	0	(80)	0	(80)	(264)
Recoveries	64	4	258	252	503
(Credit) provision	7	358	59	(1,106)	(857)
Ending balance	1,991	1,358	1,991	1,358	1,674
Ending balance: related to loans individually evaluated for impairment	0	39	0	39	0
Ending balance: related to loans collectively evaluated for impairment	1,991	1,319	1,991	1,319	1,674
LHFI [Abstract]
Ending balance	65,385	33,786	65,385	33,786	47,984
Ending balance: individually evaluated for impairment	145	545	145	545	145
Ending balance: collectively evaluated for impairment	65,240	33,241	65,240	33,241	47,839
Commercial and industrial [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,419	2,035	1,513	1,780	1,780
Charge-offs	0	(200)	(108)	(541)	(566)
Recoveries	4	273	127	274	282
(Credit) provision	(58)	(403)	(167)	192	17
Ending balance	1,365	1,705	1,365	1,705	1,513
Ending balance: related to loans individually evaluated for impairment	0	0	0	0	100
Ending balance: related to loans collectively evaluated for impairment	1,365	1,705	1,365	1,705	1,413
LHFI [Abstract]
Ending balance	97,270	83,825	97,270	83,825	85,980
Ending balance: individually evaluated for impairment	2,306	3,937	2,306	3,937	2,687
Ending balance: collectively evaluated for impairment	94,964	79,888	94,964	79,888	83,293
Multi-family [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	174	345	171	285	285
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
(Credit) provision	57	(45)	60	15	(114)
Ending balance	231	300	231	300	171
Ending balance: related to loans individually evaluated for impairment	0	0	0	0	0
Ending balance: related to loans collectively evaluated for impairment	231	300	231	300	171
LHFI [Abstract]
Ending balance	21,010	16,172	21,010	16,172	16,249
Ending balance: individually evaluated for impairment	0	0	0	0	0
Ending balance: collectively evaluated for impairment	21,010	16,172	21,010	16,172	16,249
Residential real estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	586	665	586	616	616
Charge-offs	(40)	0	(40)	0	0
Recoveries	8	3	19	11	20
(Credit) provision	93	(84)	82	(43)	(50)
Ending balance	647	584	647	584	586
Ending balance: related to loans individually evaluated for impairment	18	28	18	28	27
Ending balance: related to loans collectively evaluated for impairment	629	556	629	556	559
LHFI [Abstract]
Ending balance	50,104	42,166	50,104	42,166	51,588
Ending balance: individually evaluated for impairment	677	935	677	935	889
Ending balance: collectively evaluated for impairment	49,427	41,231	49,427	41,231	50,699
Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,993	1,378	1,749	1,429	1,429
Charge-offs	(164)	(75)	(447)	(177)	(612)
Recoveries	9	4	17	16	26
(Credit) provision	214	98	733	137	906
Ending balance	2,052	1,405	2,052	1,405	1,749
Ending balance: related to loans individually evaluated for impairment	204	46	204	46	194
Ending balance: related to loans collectively evaluated for impairment	1,848	1,359	1,848	1,359	1,555
LHFI [Abstract]
Ending balance	66,898	58,090	66,898	58,090	64,341
Ending balance: individually evaluated for impairment	1,088	180	1,088	180	876
Ending balance: collectively evaluated for impairment	65,810	57,910	65,810	57,910	63,465
Tax certificates [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	252	342	347	667	667
Charge-offs	(25)	(8)	(31)	(433)	(471)
Recoveries	6	33	8	52	53
(Credit) provision	125	(50)	34	31	98
Ending balance	358	317	358	317	347
Ending balance: related to loans individually evaluated for impairment	115	1	115	1	0
Ending balance: related to loans collectively evaluated for impairment	243	316	243	316	347
LHFI [Abstract]
Ending balance	4,390	4,804	4,390	4,804	4,755
Ending balance: individually evaluated for impairment	1,110	1,013	1,110	1,013	1,125
Ending balance: collectively evaluated for impairment	3,280	3,791	3,280	3,791	3,630
Consumer [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	27	34	27	38	38
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
(Credit) provision	(5)	1	(5)	(3)	(11)
Ending balance	22	35	22	35	27
Ending balance: related to loans individually evaluated for impairment	0	0	0	0	0
Ending balance: related to loans collectively evaluated for impairment	22	35	22	35	27
LHFI [Abstract]
Ending balance	2,254	2,665	2,254	2,665	2,527
Ending balance: individually evaluated for impairment	0	0	0	0	0
Ending balance: collectively evaluated for impairment	2,254	2,665	2,254	2,665	2,527
Unallocated [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	137	0	149	149
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
(Credit) provision	0	(13)	0	(25)	(149)
Ending balance	0	124	0	124	0
Ending balance: related to loans individually evaluated for impairment	0	0	0	0	0
Ending balance: related to loans collectively evaluated for impairment	0	124	0	124	0
LHFI [Abstract]
Ending balance	0	0	0	0	0
Ending balance: individually evaluated for impairment	0	0	0	0	0
Ending balance: collectively evaluated for impairment	$ 0	$ 0	$ 0	$ 0	$ 0