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Income Taxes (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Tax [Line Items] |  |  |  |  |  |  |  |  |  |  |
Deferred Tax Assets Tax Deferred Compensation Noncurrent | $ 1,074,000 |  |  |  | $ 2,082,000 |  |  |  | $ 1,074,000 | $ 2,082,000 |
Income Tax Expense (Benefit) | 2,450,000 | $ 2,599,000 | $ 3,141,000 | $ 1,450,000 | $ 3,050,000 | $ 2,180,000 | $ 3,193,000 | $ 1,627,000 | 9,640,000 | 10,050,000 | $ 9,992,000
Income Tax Examination, Penalties and Interest Accrued | $ 0 |  |  |  |  |  |  |  | 0 |  |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Value |  |  |  |  |  |  |  |  | 893,000 |  |
Adjustments Related to Tax Withholding for Share-based Compensation |  |  |  |  |  |  |  |  | $ 360,000 | 360,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period |  |  |  |  |  |  |  |  | 59,000 |  |
Stock Option [Member] |  |  |  |  |  |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  | $ 230,000 | $ 10,000 | $ (9,200)

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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 The amount of adjustment to stockholders' equity associated with an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References No definition available. + 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=6907707&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=6907707&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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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