Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Research	$ 2,382
Description Of Annual Utilization, Operating Loss Carry Forward	limited to annual utilization of €1,000 plus fifty per cent (50%) of any taxable income in excess of €1,000.
Deferred Tax Assets, Net, Noncurrent	$ 11,581	$ 13,102
Deferred Tax Amortized Rate	7.00%
Tax Relief Amount	$ 8,500
Effective Income Tax Rate Reconciliation, Percent, Total	48.10%	1.60%	19.50%
Income Tax Expense (Benefit)	$ 37,735	$ (1,407)	$ (11,244)
Deferred Tax Assets, Net, Current	11,581
Excess Tax Benefit from Share-based Compensation, Financing Activities	2,814	0	0
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	3,720
Deferred Tax Liabilities, Gross, Current	1,338
Deferred Tax Liabilities, Prepaid Expenses	842	986
Income Tax Reconciliation Income tax deferred charge	$ 0	15,273	$ 0
France [Member]
Income Taxes [Line Items]
Income Tax Expense (Benefit)		$ 14,088