Goodwill and Intangible Assets Government Grants (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Government grants		$ 612	$ 0	$ 8,650
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	50 years
Other Current Liabilities [Member]
Finite-Lived Intangible Assets [Line Items]
Government grants		421		8,287
Other Noncurrent Liabilities [Member]
Finite-Lived Intangible Assets [Line Items]
Government grants		$ 368		$ 8,133