Contingencies (Details)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Percentage revenue representation for investigation of sales practices (less than 1%)	1.00%	1.00%	1.00%	1.00%	1.00%