Loans and Allowance for Loan and Lease Losses - ALLL Activity (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended	18 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Jun. 30, 2016
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	$ 17,565	$ 16,913	$ 17,452	$ 16,802	$ 16,802	$ 16,802
Charge-offs	(6)	(164)	(16)	(237)
Recoveries	889	233	1,012	417
(Reversal of) provision for loan and lease losses	(1,000)		(1,000)
Balance, at the end of the period	17,448	16,982	17,448	16,982	17,452	17,448
Amount of allowance attributed to:
Allowance for loan and lease losses individually evaluated for impairment	309		309		254	309
Allowance for loan and lease losses collectively evaluated for impairment	17,062		17,062		17,119	17,062
Recorded investment in loan individually evaluated for impairment	15,389		15,389		16,303	15,389
Recorded investment in loan collectively evaluated for impairment	1,310,313		1,310,313		1,222,202	1,310,313
Total gross loans held for investment	1,333,719		1,333,719		1,247,280	1,333,719
Reserve for off-balance sheet commitments						500
Receivables Acquired with Deteriorated Credit Quality
Amount of allowance attributed to:
Allowance for Loans acquired with deteriorated credit quality	77		77		79	77
Recorded investment in loans acquired with deteriorated credit quality	8,017		8,017		8,775	8,017
Non-PCI Loans
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period			17,373
Balance, at the end of the period	17,371		17,371		17,373	17,371
Amount of allowance attributed to:
Total gross loans held for investment	1,325,702		1,325,702		1,238,505	1,325,702
PCI loans
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period			79
Balance, at the end of the period	77		77		79	77
Amount of allowance attributed to:
Total gross loans held for investment	8,017		8,017		8,775	8,017
Allowance for losses on acquired loans and leases			100		100
MISN \| Non-PCI Loans
Amount of allowance attributed to:
Total gross loans held for investment	145,900		145,900		163,800	145,900
Allowance for losses on acquired loans and leases			200		200
MISN \| Non-PCI & PCI Loans
Amount of allowance attributed to:
Total gross loans held for investment	153,900		153,900			153,900
Commercial
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	5,592	4,495	5,372	5,125	5,125	5,125
Charge-offs	(4)	(143)	(12)	(143)
Recoveries	129	142	230	309
(Reversal of) provision for loan and lease losses	(108)	499	19	(298)
Balance, at the end of the period	5,609	4,993	5,609	4,993	5,372	5,609
Amount of allowance attributed to:
Allowance for loan and lease losses individually evaluated for impairment	273		273		195	273
Allowance for loan and lease losses collectively evaluated for impairment	5,304		5,304		5,144	5,304
Recorded investment in loan individually evaluated for impairment	6,854		6,854		5,363	6,854
Recorded investment in loan collectively evaluated for impairment	235,849		235,849		221,573	235,849
Total gross loans held for investment	244,706		244,706		229,171	244,706
Commercial \| Receivables Acquired with Deteriorated Credit Quality
Amount of allowance attributed to:
Allowance for Loans acquired with deteriorated credit quality	32		32		33	32
Recorded investment in loans acquired with deteriorated credit quality	2,003		2,003		2,235	2,003
Commercial \| Non-PCI Loans
Amount of allowance attributed to:
Total gross loans held for investment	242,703		242,703		226,936	242,703
Commercial \| PCI loans
Amount of allowance attributed to:
Total gross loans held for investment	2,003		2,003		2,235	2,003
Construction and land
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	558	2,044	623	2,000	2,000	2,000
Charge-offs				(34)
Recoveries	131	13	144	24
(Reversal of) provision for loan and lease losses	(198)	(117)	(276)	(50)
Balance, at the end of the period	491	1,940	491	1,940	623	491
Amount of allowance attributed to:
Allowance for loan and lease losses collectively evaluated for impairment	486		486		618	486
Recorded investment in loan individually evaluated for impairment	4,838		4,838		5,138	4,838
Recorded investment in loan collectively evaluated for impairment	31,656		31,656		30,249	31,656
Construction and land \| Receivables Acquired with Deteriorated Credit Quality
Amount of allowance attributed to:
Allowance for Loans acquired with deteriorated credit quality	5		5		5	5
Recorded investment in loans acquired with deteriorated credit quality	259		259		282	259
Consumer
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	159	190	173	202	202	202
Charge-offs	(2)	(5)	(4)	(5)
Recoveries	8	5	12	8
(Reversal of) provision for loan and lease losses	17	(19)	1	(34)
Balance, at the end of the period	182	171	182	171	173	182
Amount of allowance attributed to:
Allowance for loan and lease losses collectively evaluated for impairment	182		182		173	182
Recorded investment in loan individually evaluated for impairment	226		226		146	226
Recorded investment in loan collectively evaluated for impairment	4,718		4,718		5,887	4,718
Total gross loans held for investment	4,944		4,944		6,033	4,944
Consumer \| Non-PCI Loans
Amount of allowance attributed to:
Total gross loans held for investment	4,944		4,944		6,033	4,944
Unallocated
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	425	810	123	346	346	346
(Reversal of) provision for loan and lease losses	87	(567)	389	(103)
Balance, at the end of the period	512	243	512	243	123	512
Amount of allowance attributed to:
Allowance for loan and lease losses collectively evaluated for impairment	512		512		123	512
Other real estate secured
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	10,831	9,374	11,161	9,129	9,129	9,129
Charge-offs		(16)		(55)
Recoveries	621	73	626	76
(Reversal of) provision for loan and lease losses	(798)	204	(1,133)	485
Balance, at the end of the period	10,654	$ 9,635	10,654	$ 9,635	11,161	10,654
Amount of allowance attributed to:
Allowance for loan and lease losses individually evaluated for impairment	36		36		59	36
Allowance for loan and lease losses collectively evaluated for impairment	10,578		10,578		11,061	10,578
Recorded investment in loan individually evaluated for impairment	3,471		3,471		5,656	3,471
Recorded investment in loan collectively evaluated for impairment	1,038,090		1,038,090		964,493	1,038,090
Other real estate secured \| Receivables Acquired with Deteriorated Credit Quality
Amount of allowance attributed to:
Allowance for Loans acquired with deteriorated credit quality	40		40		41	40
Recorded investment in loans acquired with deteriorated credit quality	$ 5,755		$ 5,755		$ 6,258	$ 5,755

The amount as of the balance sheet date which represents the recognized reserve for off-balance sheet commitments.

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Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of addition to allowance reserve for credit loss arising from purchase of loan and lease portfolios.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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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 allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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

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Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

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Amount of expense related to estimated loss from loan and lease transactions.

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