Income Taxes (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Line Items]
Income tax impact associated with stock option exercises		$ (2,233)	$ (481)	$ 429
Deferred Tax Assets, Valuation Allowance	[1]	3,642	3,020
Available-for-sale Securities, Income Tax Expense on Change in Unrealized Holding Gain (Loss)		(21)	(5)	(16)
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		11,300
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		100	1,100	$ 446
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		3,100	3,000
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount		136,900	78,300
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Deferred Tax Assets, Valuation Allowance		3,600	$ 3,000
Operating Loss Carryforwards		50
Tax Credit Carryforward, Amount		$ 2,300
Operating Loss Expiration Date, Range Start		2017
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ 600
US Federal [Member]
Income Tax Disclosure [Line Items]
Operating Loss Carryforwards		$ 15,300
Operating Loss Expiration Date, Range Start		2021
Earliest Tax Year [Member] | ITALY
Income Tax Disclosure [Line Items]
Income Tax Examination, Year under Examination		2004
Earliest Tax Year [Member] | GERMANY
Income Tax Disclosure [Line Items]
Income Tax Examination, Year under Examination		2008
Latest Tax Year [Member] | ITALY
Income Tax Disclosure [Line Items]
Income Tax Examination, Year under Examination		2011
Latest Tax Year [Member] | GERMANY
Income Tax Disclosure [Line Items]
Income Tax Examination, Year under Examination		2013

[1] Valuation allowance is presented gross. The valuation allowance net of the federal tax effect is ($2,367) and ($1,963) for the years ended December 31, 2015 and December 31, 2014, respectively.