Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Pension Plans (Defined Contribution Plans Narrative) (Details)

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Pension Plans (Defined Contribution Plans Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dutch Defined Contribution Plan [Member]      
Defined Contribution Plan Disclosure [Line Items]      
Defined employer contributions $ 400,000 $ 300,000 $ 0
Defined contribution plan, pension contributions outstanding 0    
Irish Defined Contribution Plan [Member]      
Defined Contribution Plan Disclosure [Line Items]      
Defined employer contributions 1,100,000 $ 300,000 $ 200,000
Defined contribution plan, pension contributions outstanding $ 0