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Loans Receivable and Allowance for Loan Losses - Schedule of Accruing and Nonaccrual TDRs (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment | $ 663 | $ 6,175 | $ 985 | $ 7,378 |
Commercial and industrial (including owner occupied commercial real estate) |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment | 0 | 5,855 | 0 | 6,203 |
Manufactured housing |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment | 450 | 320 | 772 | 1,175 |
Residential real estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment | 200 | 0 | 200 | 0 |
Other |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment | $ 13 | $ 0 | 13 | $ 0 |
Accruing |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 11,634 |  | $ 12,021
Accruing | Commercial and industrial (including owner occupied commercial real estate) |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 67 |  | 63
Accruing | Commercial real estate - owner occupied |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 41 |  | 0
Accruing | Manufactured housing |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 8,357 |  | 8,130
Accruing | Residential real estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 3,169 |  | 3,828
Accruing | Other |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 0 |  | 0
Nonaccruing |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 7,788 |  | 8,408
Nonaccruing | Commercial and industrial (including owner occupied commercial real estate) |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 5,415 |  | 5,939
Nonaccruing | Commercial real estate - owner occupied |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 0 |  | 0
Nonaccruing | Manufactured housing |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 1,875 |  | 1,766
Nonaccruing | Residential real estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 485 |  | 703
Nonaccruing | Other |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 13 |  | 0
Total |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 19,422 |  | 20,429
Total | Commercial and industrial (including owner occupied commercial real estate) |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 5,482 |  | 6,002
Total | Commercial real estate - owner occupied |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 41 |  | 0
Total | Manufactured housing |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 10,232 |  | 9,896
Total | Residential real estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | 3,654 |  | 4,531
Total | Other |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment |  |  | $ 13 |  | $ 0

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