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Income Taxes - Carryforwards (Details) - USD ($) | Dec. 31, 2016 | Dec. 31, 2015
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Components of deferred tax assets and liabilities |  |
Deferred Tax assets related to net unrealized losses on held-to-maturity securities transferred from available-for-sale securities |  | $ 2,400,000
Alternative minimum tax credit |  |
Net operating loss carryforward |  |
Alternative minimum tax credit that can be carried forward | $ 2,100,000 |
2024 |  |
Net operating loss carryforward |  |
Net operating loss carryforward | 15,000 |
2025 |  |
Net operating loss carryforward |  |
Net operating loss carryforward | 96,500,000 |
2026 |  |
Net operating loss carryforward |  |
Net operating loss carryforward | 317,000 |
2027 |  |
Net operating loss carryforward |  |
Net operating loss carryforward | 52.000 |
2028 |  |
Net operating loss carryforward |  |
Net operating loss carryforward | 177,000 |
Federal |  |
Net operating loss carryforward |  |
Net operating loss carryforward | 55,300,000 |
Federal | 2030 |  |
Net operating loss carryforward |  |
Net operating loss carryforward | 31,400,000 |
Federal | 2031 |  |
Net operating loss carryforward |  |
Net operating loss carryforward | 8,600,000 |
Federal | 2032 |  |
Net operating loss carryforward |  |
Net operating loss carryforward | 15,300,000 |
State |  |
Net operating loss carryforward |  |
Net operating loss carryforward | 99,900,000 |
State | 2021 |  |
Net operating loss carryforward |  |
Net operating loss carryforward | $ 2,800,000 |

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 + Details
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