For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Summary of Significant Accounting Policies (Concentration of Credit Risk Narrative) (Details) - Customer Concentration Risk [Member] - customers	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Sales Revenue [Member]
Concentration Risk [Line Items]
Concentration risk, number of customers	2	1
Sales Revenue [Member] \| First Largest Customer [Member]
Concentration Risk [Line Items]
Concentration risk, percent	19.00%	19.00%	18.00%
Sales Revenue [Member] \| Second Largest Customer [Member]
Concentration Risk [Line Items]
Concentration risk, percent	10.00%		10.00%
Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk, number of customers	2
Accounts Receivable [Member] \| First Largest Customer [Member]
Concentration Risk [Line Items]
Concentration risk, number of customers		0.11
Concentration risk, percent	4.00%		5.00%
Accounts Receivable [Member] \| Second Largest Customer [Member]
Concentration Risk [Line Items]
Concentration risk, percent	1.00%		1.00%