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Fair Values - Qualitative Information About Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Impaired loans | $ 5,983 | $ 9,496
Other real estate owned | 5,161,919 | 4,997,318
Nonrecurring basis |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Impaired loans | 5,983 | 9,496
Other real estate owned | 6,897 | 8,515
Commercial real estate | Nonrecurring basis |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Impaired loans | 3,057 | 3,698
Other real estate owned | 2,644 | 2,796
Commercial real estate | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Impaired loans | 3,057 | 3,698
Construction real estate | Nonrecurring basis |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Other real estate owned | 3,322 | 3,387
SEPH commercial land and development | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Impaired loans |  | 2,044
Remaining commercial | Nonrecurring basis |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Impaired loans | 541 | 1,872
Remaining commercial | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Impaired loans | 541 | 1,872
Residential real estate | Nonrecurring basis |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Impaired loans | 2,385 | 1,882
Other real estate owned | 931 | 2,332
Residential real estate | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Impaired loans | 2,385 | 1,882
Commercial real estate | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Other real estate owned | 2,644 | 2,796
Construction real estate | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Other real estate owned | 3,322 | 3,387
Residential Real Estate | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Other real estate owned | $ 931 | $ 2,332
Sales comparison approach | Commercial real estate | Low | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 0.00% | 0.00%
Sales comparison approach | Commercial real estate | High | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 90.00% | 45.90%
Sales comparison approach | Commercial real estate | Weighted Average [Member] | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 20.20% | 20.30%
Sales comparison approach | SEPH commercial land and development | Low | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables |  | 5.00%
Sales comparison approach | SEPH commercial land and development | High | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables |  | 40.00%
Sales comparison approach | SEPH commercial land and development | Weighted Average [Member] | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables |  | 22.10%
Sales comparison approach | Remaining commercial | Low | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 0.00% | 0.00%
Sales comparison approach | Remaining commercial | High | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 11.10% | 25.30%
Sales comparison approach | Remaining commercial | Weighted Average [Member] | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 1.60% | 1.00%
Sales comparison approach | Residential real estate | Low | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 0.00% | 0.00%
Sales comparison approach | Residential real estate | High | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 110.00% | 96.70%
Sales comparison approach | Residential real estate | Weighted Average [Member] | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 17.00% | 12.50%
Sales comparison approach | Commercial real estate | Low | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 0.00% | 2.00%
Sales comparison approach | Commercial real estate | High | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 68.40% | 71.00%
Sales comparison approach | Commercial real estate | Weighted Average [Member] | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 26.50% | 26.90%
Sales comparison approach | Construction real estate | Low | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 0.00% | 0.00%
Sales comparison approach | Construction real estate | High | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 90.00% | 85.00%
Sales comparison approach | Construction real estate | Weighted Average [Member] | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 24.70% | 24.30%
Sales comparison approach | Residential Real Estate | Low | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 3.20% | 0.00%
Sales comparison approach | Residential Real Estate | High | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 79.70% | 61.80%
Sales comparison approach | Residential Real Estate | Weighted Average [Member] | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Adj to comparables | 30.60% | 23.00%
Income approach | Commercial real estate | Low | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Capitalization rate | 9.00% | 7.00%
Income approach | Commercial real estate | High | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Capitalization rate | 10.60% | 13.30%
Income approach | Commercial real estate | Weighted Average [Member] | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Capitalization rate | 10.10% | 9.50%
Income approach | Residential real estate | Low | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Capitalization rate | 10.00% | 3.80%
Income approach | Residential real estate | High | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Capitalization rate | 10.00% | 10.10%
Income approach | Residential real estate | Weighted Average [Member] | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Capitalization rate | 10.00% | 9.10%
Income approach | Commercial real estate | Low | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Capitalization rate | 13.00% | 9.50%
Income approach | Commercial real estate | High | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Capitalization rate | 14.00% | 9.50%
Income approach | Commercial real estate | Weighted Average [Member] | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Capitalization rate | 13.10% | 9.50%
Cost approach | Commercial real estate | Low | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Fair Value Inputs, Accumulated Depreciation | 17.00% | 50.00%
Cost approach | Commercial real estate | High | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Fair Value Inputs, Accumulated Depreciation | 18.00% | 50.00%
Cost approach | Commercial real estate | Weighted Average [Member] | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Fair Value Inputs, Accumulated Depreciation | 17.80% | 50.00%
Cost approach | Residential real estate | Low | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Fair Value Inputs, Accumulated Depreciation |  | 33.30%
Cost approach | Residential real estate | High | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Fair Value Inputs, Accumulated Depreciation |  | 50.00%
Cost approach | Residential real estate | Weighted Average [Member] | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Fair Value Inputs, Accumulated Depreciation |  | 43.40%
Bulk sale approach | SEPH commercial land and development | Low | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Discount rate |  | 10.70%
Bulk sale approach | SEPH commercial land and development | High | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Discount rate |  | 10.70%
Bulk sale approach | SEPH commercial land and development | Weighted Average [Member] | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Discount rate |  | 10.70%
Bulk sale approach | Remaining commercial | Low | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Discount rate | 10.00% | 10.00%
Bulk sale approach | Remaining commercial | High | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Discount rate | 10.00% | 10.70%
Bulk sale approach | Remaining commercial | Weighted Average [Member] | Nonrecurring basis | Loans receivable |  |
Fair Value Inputs [Abstract] |  |
Discount rate | 10.00% | 10.00%
Bulk sale approach | Construction real estate | Low | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Discount rate | 15.00% | 15.00%
Bulk sale approach | Construction real estate | High | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Discount rate | 15.00% | 15.00%
Bulk sale approach | Construction real estate | Weighted Average [Member] | Nonrecurring basis | Other real estate owned |  |
Fair Value Inputs [Abstract] |  |
Discount rate | 15.00% | 15.00%

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- Definition Ratio of the net operating income produced by an asset and its capital cost (original prices paid to buy the asset), 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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