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Loans - Summary of Recorded Investment in Impaired Portfolio Loans by Category (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2017 USD ($) loan | Sep. 30, 2016 loan | Dec. 31, 2016 USD ($)
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Restructured, not on non-accrual | $ 9,500 |  |
Impaired Financing Receivable, Related Allowance | 1,200 |  |
Non-Covered Loans |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | $ 8,985 |  | $ 15,391
Financing Receivable, Modifications, Number of Contracts | loan | 1 | 4 |
Non-accrual | $ 8,264 |  | 13,060
Restructured, not on non-accrual | 721 |  | 2,331
Impaired Financing Receivable, Related Allowance | 2,374 |  | 3,064
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 2,417 |  | 3,064
Non-Covered Loans | Commercial and industrial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | $ 7,451 |  | 12,357
Financing Receivable, Modifications, Number of Contracts | loan | 1 | 2 |
Non-accrual | $ 6,730 |  | 10,046
Restructured, not on non-accrual | 721 |  | 2,311
Impaired Financing Receivable, Related Allowance | 2,020 |  | 2,909
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 2,063 |  | 2,909
Non-Covered Loans | Commercial - investor owned |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | $ 544 |  | 435
Financing Receivable, Modifications, Number of Contracts | loan | 0 | 1 |
Non-accrual | $ 544 |  | 435
Restructured, not on non-accrual | 0 |  | 0
Impaired Financing Receivable, Related Allowance | 120 |  | 0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 120 |  | 0
Non-Covered Loans | Commercial - owner occupied |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | $ 0 |  | 231
Financing Receivable, Modifications, Number of Contracts | loan | 0 | 0 |
Non-accrual | $ 0 |  | 231
Restructured, not on non-accrual | 0 |  | 0
Impaired Financing Receivable, Related Allowance | 0 |  | 0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 |  | 0
Non-Covered Loans | Construction and land development |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | $ 322 |  | 2,306
Financing Receivable, Modifications, Number of Contracts | loan | 0 | 1 |
Non-accrual | $ 322 |  | 2,286
Restructured, not on non-accrual | 0 |  | 20
Impaired Financing Receivable, Related Allowance | 186 |  | 155
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 186 |  | 155
Non-Covered Loans | Residential real estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 668 |  | 62
Non-accrual | 668 |  | 62
Restructured, not on non-accrual | 0 |  | 0
Impaired Financing Receivable, Related Allowance | 48 |  | 0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 48 |  | 0
Non-Covered Loans | Consumer and other |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | $ 0 |  | 0
Financing Receivable, Modifications, Number of Contracts | loan | 0 | 0 |
Non-accrual | $ 0 |  | 0
Restructured, not on non-accrual | 0 |  | 0
Impaired Financing Receivable, Related Allowance | 0 |  | 0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | $ 0 |  | $ 0

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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + 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 (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554 + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 + Details
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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
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