Allowance for Loan Losses - Weighted Average Annualized Balance of Recorded Investment and Interest Income on Impaired Loans (Details) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2016 |
Dec. 31, 2015 |
|
| Financing Receivable Modifications [Line Items] | ||
| Average Recorded Investment | $ 3,391 | $ 14,469 |
| Interest Income after Impairment | 24 | 677 |
| Residential Properties | ||
| Financing Receivable Modifications [Line Items] | ||
| Average Recorded Investment | 27 | |
| Interest Income after Impairment | 2 | |
| Commercial Real Estate | ||
| Financing Receivable Modifications [Line Items] | ||
| Average Recorded Investment | 1,788 | 6,487 |
| Interest Income after Impairment | 5 | 281 |
| Commercial and Industrial Loans | ||
| Financing Receivable Modifications [Line Items] | ||
| Average Recorded Investment | 1,600 | 7,850 |
| Interest Income after Impairment | 19 | 394 |
| Consumer Loans | ||
| Financing Receivable Modifications [Line Items] | ||
| Average Recorded Investment | $ 3 | $ 105 |