Basis of Presentation and Significant Accounting Policies - Concentration Risks (Details) - Customer Concentration Risk [Member] - Sales [Member] - customer	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Product Information [Line Items]
Customers above benchmark (in customers)	1	2	1
Concentration risk, percentage	10.00%	10.00%	10.00%
Customer A
Product Information [Line Items]
Concentration risk, percentage	16.30%
Customer B
Product Information [Line Items]
Concentration risk, percentage		12.50%
Customer B [Member]
Product Information [Line Items]
Concentration risk, percentage		14.50%	13.00%