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Loans and Leases Receivable and Allowance for Loan and Lease Losses - Schedule of Accruing and Nonaccrual TDRs (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment | $ 196 | $ 473 | $ 1,142 | $ 1,458 |
Commercial and industrial (including owner occupied commercial real estate) |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment | 0 | 0 | 431 | 0 |
Residential real estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment | 0 | 152 | 83 | 352 |
Manufactured housing |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment | 196 | 321 | 628 | 1,093 |
Other consumer |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment | $ 0 | $ 0 | 0 | $ 13 |
Accruing TDRs |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 11,403 |  | $ 11,624
Accruing TDRs | Commercial and industrial (including owner occupied commercial real estate) |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 61 |  | 64
Accruing TDRs | Commercial real estate owner occupied |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 16 |  | 32
Accruing TDRs | Residential real estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 2,964 |  | 3,026
Accruing TDRs | Manufactured housing |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 8,362 |  | 8,502
Accruing TDRs | Other consumer |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 0 |  | 0
Nonaccrual TDRs |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 2,103 |  | 7,572
Nonaccrual TDRs | Commercial and industrial (including owner occupied commercial real estate) |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 29 |  | 5,273
Nonaccrual TDRs | Commercial real estate owner occupied |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 0 |  | 0
Nonaccrual TDRs | Residential real estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 639 |  | 667
Nonaccrual TDRs | Manufactured housing |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 1,424 |  | 1,620
Nonaccrual TDRs | Other consumer |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 11 |  | 12
Total |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 13,506 |  | 19,196
Total | Commercial and industrial (including owner occupied commercial real estate) |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 90 |  | 5,337
Total | Commercial real estate owner occupied |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 16 |  | 32
Total | Residential real estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 3,603 |  | 3,693
Total | Manufactured housing |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | 9,786 |  | 10,122
Total | Other consumer |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded investment |  |  | $ 11 |  | $ 12

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