Summary of Significant Accounting Policies Concentration (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	10.00%	10.00%
Sales Revenue, Goods, Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	10.00%	10.00%
Geographic Concentration Risk [Member] | Sales Revenue, Goods, Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	13.60%	13.90%	10.50%