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Income Taxes (Details 2)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Differences between the U.S. federal statutory rate and the Company's effective tax rate for continuing operations
U.S federal statutory rate	35.00%	35.00%	35.00%
Deferred balance adjustments due to Tax Act, net	(31.60%)	0.00%	0.00%
State income taxes, net of U.S. federal income tax expense	5.30%	5.20%	4.60%
Change in valuation allowance	6.40%	1.60%	0.00%
Domestic production/manufacturing deduction	(1.60%)	(1.90%)	(2.40%)
Tax differential on foreign earnings	3.20%	0.60%	0.30%
Deferred state tax adjustments, net	(2.40%)	1.60%	0.00%
Non-deductible meals and entertainment	1.70%	1.00%	0.60%
Stock compensation excess tax benefits	(3.10%)	0.00%	0.00%
Uncertain tax positions	2.00%	0.00%	(0.40%)
Provision to return adjustments, net	(0.30%)	0.80%	0.50%
Other income, net	(0.50%)	0.20%	0.20%
Effective rate	14.10%	44.10%	38.40%

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The sum of the differences between the effective income tax rate and domestic federal statutory income tax rate attributable to provision to return adjustments.

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