Summary of Significant Accounting Policies (Concentration of Credit Risk Narrative) (Details) (Customer Concentration Risk [Member])	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2013 customers	Dec. 31, 2012 customers	Dec. 31, 2011 customers
Sales Revenue [Member]
Concentration Risk [Line Items]
Concentration risk, number of customers		2	1	1
Concentration risk, percent	17.00%			17.00%
Sales Revenue [Member] | First Largest Customer [Member]
Concentration Risk [Line Items]
Concentration risk, percent		18.00%
Sales Revenue [Member] | Second Largest Customer [Member]
Concentration Risk [Line Items]
Concentration risk, percent		10.00%
Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk, number of customers		2
Concentration risk, percent			10.00%
Accounts Receivable [Member] | First Largest Customer [Member]
Concentration Risk [Line Items]
Concentration risk, percent		5.00%
Accounts Receivable [Member] | Second Largest Customer [Member]
Concentration Risk [Line Items]
Concentration risk, percent		1.00%