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Loans Receivable and Allowance for Loan Losses (Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | $ 3,238 |  | $ 3,238 |  | $ 2,855
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 74 |  | 74 |  | 6,373
Impaired Financing Receivable, Recorded Investment | 3,312 |  | 3,312 |  | 9,228
Unpaid Principal Balance, With no related allowance recorded | 4,098 |  | 4,098 |  | 4,826
Unpaid Principal Balance, With an allowance recorded | 1,020 |  | 1,020 |  | 6,446
Unpaid Principal Balance, Total | 5,118 |  | 5,118 |  | 11,272
Associated Allowance | 15 |  | 15 |  | 1,613
Average Recorded Investment, Total | 3,303 | $ 11,618 | 3,379 | $ 11,565 |
Interest Income Recognized, Total | 26 | 70 | 59 | 467 |
Residential Real Estate Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 155 |  | 155 |  | 168
Impaired Financing Receivable, Recorded Investment | 155 |  | 155 |  | 168
Unpaid Principal Balance, With no related allowance recorded | 159 |  | 159 |  | 173
Unpaid Principal Balance, Total | 159 |  | 159 |  | 173
Associated Allowance | 0 |  | 0 |  | 0
Average Recorded Investment, Total | 157 | 236 | 161 | 232 |
Interest Income Recognized, Total | 1 | 1 | 2 | 2 |
Commercial Real Estate Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 3,083 |  | 3,083 |  | 2,644
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 74 |  | 74 |  | 6,373
Impaired Financing Receivable, Recorded Investment | 3,157 |  | 3,157 |  | 9,017
Unpaid Principal Balance, With no related allowance recorded | 3,939 |  | 3,939 |  | 4,610
Unpaid Principal Balance, With an allowance recorded | 1,020 |  | 1,020 |  | 6,446
Unpaid Principal Balance, Total | 4,959 |  | 4,959 |  | 11,056
Associated Allowance | 15 |  | 15 |  | 1,613
Average Recorded Investment, Total | 3,146 | 11,382 | 3,218 | 11,333 |
Interest Income Recognized, Total | $ 25 | $ 69 | $ 57 | $ 465 |
Commercial, financial and agricultural loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment |  |  |  |  | 43
Impaired Financing Receivable, Recorded Investment |  |  |  |  | 43
Unpaid Principal Balance, With no related allowance recorded |  |  |  |  | 43
Unpaid Principal Balance, Total |  |  |  |  | 43
Associated Allowance |  |  |  |  | $ 0

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