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Loan Servicing - Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Loan Sales And Mortgage Servicing Rights [Line Items] |  |  |  |  |
Servicing assets | $ 5,370,000 |  | $ 5,370,000 |  | $ 3,704,000
Loan servicing fees, net of amortization | 314,000 | $ 95,000 | 571,000 | $ 384,000 |
Mortgage Loans |  |  |  |  |
Loan Sales And Mortgage Servicing Rights [Line Items] |  |  |  |  |
Servicing assets | 1,804,000 |  | 1,804,000 |  | 1,184,000
SBA Loans |  |  |  |  |
Loan Sales And Mortgage Servicing Rights [Line Items] |  |  |  |  |
Servicing assets | $ 4,982,000 |  | $ 4,982,000 |  | $ 3,142,000

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- Definition Loan sales and mortgage servicing rights. + References No definition available. + Details
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- Definition Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 + Details
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- Definition Amount of revenue from servicing real estate mortgages, credit cards, and other financial assets held by others. Includes premiums received in lieu of regular servicing fees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13 (d)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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