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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income tax rate |  |  | 35.00% | 35.00% | 35.00%
Increase in income tax expense |  |  | $ 2,502 |  |
Decrease in net deferred tax assets | $ 2,502 |  | (2,502) |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 408 |  | 408 | $ 465 | $ 1,581
Income tax provision included in expense |  |  | 106 | 1,419 | 110
Income tax provision included in expense, federal benefit |  |  | 13 | 667 | 60
Income tax provision included in expense, penalties and accrued interest | 106 |  | 106 | $ 0 | $ 2,086
State and Local Jurisdiction [Member] |  |  |  |  |
Operating Loss Carryforwards | 116,621 |  | 116,621 |  |
Operating Loss Carryforwards, Valuation Allowance | 80,749 |  | 80,749 |  |
U.S. Federal [Member] |  |  |  |  |
Operating Loss Carryforwards | 18,578 |  | 18,578 |  |
Tax Credit Carryforwards | $ 2,051 |  | $ 2,051 |  |
U.S. Federal [Member] | Earliest Tax Year [Member] |  |  |  |  |
Income Tax Examination, Year under Examination |  |  | 2015 |  |
U.S. Federal [Member] | Latest Tax Year [Member] |  |  |  |  |
Income Tax Examination, Year under Examination |  |  | 2016 |  |
Minimum [Member] | State and Local Jurisdiction [Member] |  |  |  |  |
Operating Loss Carryforwards, Expiration Date |  |  | Dec. 31, 2020 |  |
Minimum [Member] | U.S. Federal [Member] |  |  |  |  |
Carryforwards, Expiration Date |  |  | Dec. 31, 2030 |  |
Maximum [Member] | State and Local Jurisdiction [Member] |  |  |  |  |
Operating Loss Carryforwards, Expiration Date |  |  | Dec. 31, 2037 |  |
Maximum [Member] | U.S. Federal [Member] |  |  |  |  |
Carryforwards, Expiration Date |  |  | Dec. 31, 2037 |  |
Scenario, Plan [Member] |  |  |  |  |
Income tax rate |  | 21.00% |  |  |

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 + Details
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