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Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Derivative Credit Risk Valuation Adjustment, Derivative Assets | $ 0 |  | $ 0
Derivative Credit Risk Valuation Adjustment, Derivative Liabilities | $ 0 |  | $ 0
Fair Value Inputs, Prepayment Rate | 1.00% |  | 1.00%
Annual prepayments maturity | 100.00% |  | 100.00%
Additional basis points | 1.50% |  | 1.50%
Maximum [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Collateral discount | 30.00% | 30.00% |
Minimum [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Collateral discount | 20.00% | 20.00% |

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- Definition Additional basis points, annual defaults from banks. + References No definition available. + Details
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- Definition Unobservable Inputs Fair Value Measurement Collateral Discount Percent + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Rate at which loans or a loan portfolio are expected to prepay principal balances, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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