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

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Amount of foreign earnings repatriated from subsidiaries outside the country of domicile.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Income Taxes (Tax Credit Carryforwards) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Tax Credit Carryforward [Line Items]
State income taxes, net of federal tax benefit (percent)		1.70%	3.20%	1.70%
Deferred income taxes		$ (2,871)	$ 2,251	$ (284)
Foreign earnings repatriated	$ 9,300
Tax impact of repatriated foreign earnings	$ 1,100
New York [Member]
Tax Credit Carryforward [Line Items]
State income taxes, net of federal tax benefit (percent)				0.00%
Deferred income taxes				$ 2,300
Federal [Member]
Tax Credit Carryforward [Line Items]
Operating loss carryforwards		99,300
Federal [Member] \| Research and Development Credit [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward		$ 8,100
State and Local Jurisdiction [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward				$ 3,300