Income Taxes Unrecognized Tax Benefits Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) number	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	$ 4,610	$ 5,270	$ 8,470
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	4,100	4,800
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 2,200	$ 2,200
Minimum [Member]
Income Tax Contingency [Line Items]
Open Tax Year	2014
Maximum [Member]
Income Tax Contingency [Line Items]
Open Tax Year	2010
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Income Tax Examinations, Number | number	1