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Loans Receivable and Allowance for Loan Losses - Schedule of Accruing and Nonaccrual TDRs (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | $ 8,071,000 | $ 6,616,000 | $ 7,457,000
Commercial and industrial (including owner occupied commercial real estate) |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 6,437,000 | 76,000 | 791,000
Manufactured housing |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 1,634,000 | 2,286,000 | 6,251,000
Residential real estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 0 | 2,410,000 | 204,000
Accruing |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 12,021 | 11,526 | 8,270
Accruing | Commercial and industrial (including owner occupied commercial real estate) |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 63 | 73 | 27
Accruing | Commercial real estate - owner occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 0 | 12 | 0
Accruing | Commercial real estate non-owner occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 0 | 0 | 0
Accruing | Manufactured housing |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 8,130 | 7,429 | 5,911
Accruing | Residential real estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 3,828 | 4,012 | 2,332
Nonaccruing |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 8,408 | 4,870 | 3,172
Nonaccruing | Commercial and industrial (including owner occupied commercial real estate) |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 5,939 | 146 | 518
Nonaccruing | Commercial real estate - owner occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 0 | 0 | 0
Nonaccruing | Commercial real estate non-owner occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 0 | 1,945 | 204
Nonaccruing | Manufactured housing |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 1,766 | 2,072 | 2,389
Nonaccruing | Residential real estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 703 | 707 | 61
Total |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 20,429 | 16,396 | 11,442
Total | Commercial and industrial (including owner occupied commercial real estate) |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 6,002 | 219 | 545
Total | Commercial real estate - owner occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 0 | 12 | 0
Total | Commercial real estate non-owner occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 0 | 1,945 | 204
Total | Manufactured housing |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | 9,896 | 9,501 | 8,300
Total | Residential real estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | $ 4,531 | $ 4,719 | $ 2,393

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Post-modification amount of investment in financing receivables 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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