Loans - Aging Analysis of Past Due and Nonaccrual Loans by Class (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, nonaccrual status	$ 5,681	$ 7,237
Loans receivable, past due	13,931	13,279
Loans receivable, current	1,018,923	945,362
Loan receivable, current	1,032,873	960,135
Total loans	1,032,854	958,641
SBA loans held for sale	13,950	14,773
Total loans	1,046,804	973,414
Troubled Debt Restructuring (TDR) \| Non Accrual
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, nonaccrual status		153
30-59 days past due
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	6,972	4,808
60-89 days past due
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	1,048	1,234
90 days and still accruing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	230	0
SBA loans held for investment
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, nonaccrual status	889	1,168
Loans receivable, past due	2,197	2,056
Loan receivable, current	41,132	40,436
Total loans	43,329	42,492
SBA loans held for investment \| 30-59 days past due
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	1,078	491
SBA loans held for investment \| 60-89 days past due
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	397
SBA loans held for investment \| 90 days and still accruing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	230	0
SBA 504 loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, nonaccrual status	0	513
Loans receivable, past due	0	513
Loan receivable, current	23,153	25,831
Total loans	23,153	26,344
SBA 504 loans \| 30-59 days past due
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
SBA 504 loans \| 60-89 days past due
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
SBA 504 loans \| 90 days and still accruing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	545,308	509,171
Commercial loans \| Other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, nonaccrual status	25	25
Loans receivable, past due	25	75
Loan receivable, current	65,526	58,372
Total loans	65,551	58,447
Commercial loans \| Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, nonaccrual status	386	401
Loans receivable, past due	4,734	2,083
Loan receivable, current	438,830	420,335
Total loans	443,564	422,418
Commercial loans \| Commercial real estate construction
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, nonaccrual status	0	0
Loans receivable, past due	0	0
Loan receivable, current	36,193	28,306
Total loans	36,193	28,306
Commercial loans \| 30-59 days past due \| Other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	50
Commercial loans \| 30-59 days past due \| Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	3,540	1,108
Commercial loans \| 30-59 days past due \| Commercial real estate construction
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Commercial loans \| 60-89 days past due \| Other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Commercial loans \| 60-89 days past due \| Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	808	574
Commercial loans \| 60-89 days past due \| Commercial real estate construction
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Commercial loans \| 90 days and still accruing \| Other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Commercial loans \| 90 days and still accruing \| Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Commercial loans \| 90 days and still accruing \| Commercial real estate construction
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Residential mortgage loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, nonaccrual status	1,682	2,672
Loans receivable, past due	4,012	5,867
Loan receivable, current	311,384	283,226
Total loans	315,396	289,093
Residential mortgage loans \| 30-59 days past due
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	2,330	2,932
Residential mortgage loans \| 60-89 days past due
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	263
Residential mortgage loans \| 90 days and still accruing
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	105,668	91,541
Consumer loans \| Other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, nonaccrual status	1,981	1,976
Loans receivable, past due	1,981	1,976
Loan receivable, current	49,163	42,154
Total loans	51,144	44,130
Consumer loans \| Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, nonaccrual status	718	482
Loans receivable, past due	982	709
Loan receivable, current	53,542	46,702
Total loans	54,524	47,411
Consumer loans \| 30-59 days past due \| Other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Consumer loans \| 30-59 days past due \| Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	24	227
Consumer loans \| 60-89 days past due \| Other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Consumer loans \| 60-89 days past due \| Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	240	0
Consumer loans \| 90 days and still accruing \| Other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Consumer loans \| 90 days and still accruing \| Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, past due	0	0
Small Business Administration
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, nonaccrual status	$ 41	$ 60

Financing receivables that are current.

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