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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Accounting Policies [Line Items] |  |
Goodwill | $ 72,334 | $ 72,334
Average required reserve balance | $ 51,600 | $ 44,200
Historical loss period used in estimating loan loss reserve | 84 months |
Reserve coverage period in historical losses | 1 year 11 months 12 days | 1 year 11 months 26 days
Compensating Balance, Amount | $ 0 |
Commercial Loan |  |
Accounting Policies [Line Items] |  |
Reserve coverage period in historical losses | 3 years 2 months 13 days | 2 years 4 months 12 days
Consumer |  |
Accounting Policies [Line Items] |  |
Financing Receivable, Allowance for Credit Losses, Factors that Influenced Management's Judgment | 0.0034 | 0.0042
Commercial Portfolio Segment [Member] |  |
Accounting Policies [Line Items] |  |
Financing Receivable, Allowance for Credit Losses, Factors that Influenced Management's Judgment | 0.0039 | 0.0053

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- Definition Allowance for Loan and Lease Losses, Current Reserve Coverage Period in Historical Losses + References No definition available. + Details
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- Definition Allowance for Loan and Lease Losses, Reserve Estimate Methodology, Historical Loss Period Factor + References No definition available. + Details
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- Definition The amount of a specific compensating balance arrangement that is maintained under an agreement for a bank loan or future credit availability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition A description of the factors that influenced management's judgment concerning the allowance for credit losses including historical losses and existing economic conditions. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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- Definition The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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