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Income Taxes (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | [1] | Dec. 31, 2016 | Sep. 30, 2016 | [1] | Jun. 30, 2016 | [1] | Mar. 31, 2016 | [1] | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Tax Assets Tax Deferred Compensation Noncurrent | $ 1,175,000 |  |  |  | $ 2,723,000 |  |  |  |  |  | $ 1,175,000 | $ 2,723,000 |
Income Tax Expense (Benefit) | (11,200,000) | $ 2,290,000 | $ 2,272,000 | $ 718,000 | 2,208,000 | [1] | $ 2,678,000 | $ 2,569,000 | $ 1,418,000 |  | (5,920,000) | 8,873,000 | $ 6,572,000
Income Tax Examination, Penalties and Interest Accrued | $ 0 |  |  |  | $ 0 |  |  |  |  |  | $ 0 | 0 | 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  |  |  |  |  |  |  | 35.00% |  |
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount |  |  |  |  |  |  |  |  |  |  | $ (11,500,000) | 0 | 0
Scenario, Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  |  |  |  |  |  | 21.00% |  |  |
Stock Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  | $ (100,000) | $ 0 | $ 230,000
[1] | Certain prior year amounts and March 31, 2017 quarterly data have been reclassified to conform with current presentation.

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- Definition The tax effect as of the balance sheet date of the amount of the estimated future tax deduction arising from stock-based compensation, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient taxable income is generated in future periods to enable the deduction to be taken. + References No definition available. + Details
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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=84230637&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=84230637&loc=d3e32698-109319 + Details
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- Definition The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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