Summary of Significant Accounting Policies (Concentration RIsk) (Details) - customer	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Credit Concentration Risk
Concentration Risk [Line Items]
Concentration risk, number of customers	0	0
Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, number of customers	0	0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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