Allowance for Loan and Lease Losses - Changes in Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 9,689	$ 11,708	$ 11,708
Charge-offs	(474)	(868)	(2,535)
Recoveries	514	637	1,264
(Credit) provision	212	(580)	(748)
Ending balance	9,941	10,897	9,689
Ending balance: related to loans individually evaluated for impairment	210	386	398
Ending balance: related to loans collectively evaluated for impairment	9,731	10,511	9,291
LHFI [Abstract]
Ending balance	531,147	418,686	499,103
Ending balance: individually evaluated for impairment	6,466	14,501	7,191
Ending balance: collectively evaluated for impairment	524,681	404,185	491,912
Commercial real estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,622	4,452	4,452
Charge-offs	(77)	0	(622)
Recoveries	176	350	380
(Credit) provision	(151)	83	(588)
Ending balance	3,570	4,885	3,622
Ending balance: related to loans individually evaluated for impairment	0	231	77
Ending balance: related to loans collectively evaluated for impairment	3,570	4,654	3,545
LHFI [Abstract]
Ending balance	237,343	194,277	225,679
Ending balance: individually evaluated for impairment	1,368	6,327	1,469
Ending balance: collectively evaluated for impairment	235,975	187,950	224,210
Construction and land development [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,674	2,292	2,292
Charge-offs	0	0	(264)
Recoveries	194	248	503
(Credit) provision	52	(1,464)	(857)
Ending balance	1,920	1,076	1,674
Ending balance: related to loans individually evaluated for impairment	0	80	0
Ending balance: related to loans collectively evaluated for impairment	1,920	996	1,674
LHFI [Abstract]
Ending balance	61,095	18,610	47,984
Ending balance: individually evaluated for impairment	145	624	145
Ending balance: collectively evaluated for impairment	60,950	17,986	47,839
Commercial and industrial [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,513	1,780	1,780
Charge-offs	(108)	(340)	(566)
Recoveries	123	1	282
(Credit) provision	(109)	594	17
Ending balance	1,419	2,035	1,513
Ending balance: related to loans individually evaluated for impairment	0	1	100
Ending balance: related to loans collectively evaluated for impairment	1,419	2,034	1,413
LHFI [Abstract]
Ending balance	92,189	83,240	85,980
Ending balance: individually evaluated for impairment	2,317	5,650	2,687
Ending balance: collectively evaluated for impairment	89,872	77,590	83,293
Multi-family [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	171	285	285
Charge-offs	0	0	0
Recoveries	0	0	0
(Credit) provision	3	60	(114)
Ending balance	174	345	171
Ending balance: related to loans individually evaluated for impairment	0	0	0
Ending balance: related to loans collectively evaluated for impairment	174	345	171
LHFI [Abstract]
Ending balance	16,576	17,594	16,249
Ending balance: individually evaluated for impairment	0	0	0
Ending balance: collectively evaluated for impairment	16,576	17,594	16,249
Residential real estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	586	616	616
Charge-offs	0	0	0
Recoveries	11	8	20
(Credit) provision	(11)	41	(50)
Ending balance	586	665	586
Ending balance: related to loans individually evaluated for impairment	25	30	27
Ending balance: related to loans collectively evaluated for impairment	561	635	559
LHFI [Abstract]
Ending balance	49,370	43,416	51,588
Ending balance: individually evaluated for impairment	843	989	889
Ending balance: collectively evaluated for impairment	48,527	42,427	50,699
Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,749	1,429	1,429
Charge-offs	(283)	(103)	(612)
Recoveries	8	11	26
(Credit) provision	519	41	906
Ending balance	1,993	1,378	1,749
Ending balance: related to loans individually evaluated for impairment	185	36	194
Ending balance: related to loans collectively evaluated for impairment	1,808	1,342	1,555
LHFI [Abstract]
Ending balance	67,267	53,473	64,341
Ending balance: individually evaluated for impairment	755	77	876
Ending balance: collectively evaluated for impairment	66,512	53,396	63,465
Tax certificates [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	347	667	667
Charge-offs	(6)	(425)	(471)
Recoveries	2	19	53
(Credit) provision	(91)	81	98
Ending balance	252	342	347
Ending balance: related to loans individually evaluated for impairment	0	8	0
Ending balance: related to loans collectively evaluated for impairment	252	334	347
LHFI [Abstract]
Ending balance	4,820	5,608	4,755
Ending balance: individually evaluated for impairment	1,038	834	1,125
Ending balance: collectively evaluated for impairment	3,782	4,774	3,630
Consumer [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	27	38	38
Charge-offs	0	0	0
Recoveries	0	0	0
(Credit) provision	0	(4)	(11)
Ending balance	27	34	27
Ending balance: related to loans individually evaluated for impairment	0	0	0
Ending balance: related to loans collectively evaluated for impairment	27	34	27
LHFI [Abstract]
Ending balance	2,487	2,468	2,527
Ending balance: individually evaluated for impairment	0	0	0
Ending balance: collectively evaluated for impairment	2,487	2,468	2,527
Unallocated [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	149	149
Charge-offs	0	0	0
Recoveries	0	0	0
(Credit) provision	0	(12)	(149)
Ending balance	0	137	0
Ending balance: related to loans individually evaluated for impairment	0	0	0
Ending balance: related to loans collectively evaluated for impairment	0	137	0
LHFI [Abstract]
Ending balance	0	0	0
Ending balance: individually evaluated for impairment	0	0	0
Ending balance: collectively evaluated for impairment	$ 0	$ 0	$ 0

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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Amount of direct write-downs of financing receivables charged against the allowance.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 50
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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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-Section 45
-Paragraph 28
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-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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