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, 2015 |
Dec. 31, 2014 |
|
| Financing Receivable Modifications [Line Items] | ||
| Average Recorded Investment | $ 14,796 | $ 7,539 |
| Interest Income after Impairment | 565 | 406 |
| Residential Properties | ||
| Financing Receivable Modifications [Line Items] | ||
| Average Recorded Investment | 36 | 3,000 |
| Interest Income after Impairment | 2 | 25 |
| Commercial Real Estate | ||
| Financing Receivable Modifications [Line Items] | ||
| Average Recorded Investment | 6,588 | 3,217 |
| Interest Income after Impairment | 220 | 140 |
| Commercial and Industrial Loans | ||
| Financing Receivable Modifications [Line Items] | ||
| Average Recorded Investment | 8,067 | 1,196 |
| Interest Income after Impairment | 343 | 241 |
| Consumer Loans | ||
| Financing Receivable Modifications [Line Items] | ||
| Average Recorded Investment | $ 105 | $ 126 |