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Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Taxes [Line Items]
U.S. federal statutory tax rate (as a percent)	21.00%	35.00%	21.00%	35.00%
Effective Income Tax Rate Reconciliation, Percent	28.80%	67.30%	28.80%	47.20%
Unrecognized Tax Benefit Including Tax Interest Accrued	$ 0.4		$ 0.4		$ 0.8
Tax Benefit Stock Compensation [Member]
Income Taxes [Line Items]
Current Federal Tax Expense (Benefit)			$ 1.0

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The gross amount of unrecognized tax benefits, including interest, pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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