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Fair Value Measurements (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Goodwill, Impairment Loss | $ 0 | $ 0
Fair Value Inputs, Prepayment Rate | 1.00% | 1.00%
Annual prepayments maturity | 100.00% | 100.00%
Additional basis points | 150.00% | 150.00%
Minimum |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Collateral discount | 20.00% | 20.00%
Maximum |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Collateral discount | 30.00% | 30.00%
Other Assets |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Write Downs Included In Other Noninterest Expense | $ 444,000 | $ 1,449,000

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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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